Answer:
The tractor applies 1,748.418 N to the plow.
Explanation:
Net Force
According to the second Newton's law, the net force exerted by an external agent on an object of mass m is:
Fn=m.a
If the acceleration is zero, then the net force is also zero. That means all forces acting on the mass are balanced.
The tractor drags the m=313 Kg plow at a constant speed, thus the acceleration is zero and so is the net force.
The horizontal forces acting on the plow are:
The force applied by the tractor FtThe friction of the ground FrSince both forces are balanced, then:
Ft=Fr
The friction force is calculated as:
[tex]Fr=\mu \cdot N[/tex]
Where [tex]\mu[/tex] is the coefficient of friction between the plow and the ground and N is the normal force. In the situation described, the normal force is equal to the weight of the plow:
[tex]N=W=m.g=313*9.8=3,067.4[/tex]
The normal force is N=3,067.4 N
The friction force is now calculated:
[tex]Fr=0.579 \cdot 3,067.4\ N[/tex]
[tex]Fr=1,748.418\ N[/tex]
Thus, the tractor applies 1,748.418 N to the plow.
From Earth stars appear very dim, but in space they are quite bright. From Earth we are seeing the stars
A) absolute magnitude
B) apparent magnitude
C) available magnitude
D) absent magnitude
Answer:
B
Explanation:
how does the initial velocity affect the final velocity
Answer:
Initial velocity is independent of the slope of the graph; that is, the acceleration. An object thrown downward still accelerates after release at the same rate as an object that is dropped.
Which mathematical statement shows the relationship between gravity and mass?
Answer
F (force of gravity) = M (mass of an object) × G (acceleration due to gravity)
Step-by-step explanation:
Force of gravity (F) = Mass (M) × Gravitational acceleration (G)
The weight of an abject is equal to its gravitational force!
Explanation:
Answer:
[tex]F_{g} = \frac{m}{d^{2} }[/tex] shows the relationship between gravity and mass.
Explanation:
According to the Newton's law of gravitation, the gravitational force between two bodies is,
[tex]F_{g} = G.\frac{m_{1}.m_{2} }{d^{2} }[/tex]
here [tex]m_{1} and m_{2}[/tex] are masses, d is distance between them.
What is Newton's law of Gravitation ?It states that gravitational force acting two bodies is directly proportional to the product of masses and inversely proportional to the square of the distance between them.
In above formula ,
If [tex]m_{1} = 1 and[/tex] [tex]m_{2} = m[/tex]
so [tex]F_{g} = G \frac{m}{d^{2} }[/tex]
Since G is constant ,
[tex]F_{g}[/tex] ∝[tex]\frac{m}{d^{2} }[/tex]
Hence second option is correctly showing relationship between gravity and mass.
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The bowler threw the 9kg bowling ball with a force
of 90N. What was the bowling ball's acceleration?
Answer:
10 m/s²
Explanation:
9kg= mass 90N=force acceleration=?
the equation is;
Acceleration (m/s²)= force(N) ÷ mass(kg)
find the mass of a football player who's momentum is 630 kg•m/s backward and. is traveling at 7 m/s.
Answer:
The answer is 90 kgExplanation:
In order to find the mass of the football we use the formula
[tex]m = \frac{p}{v} \\ [/tex]
where
p is the momentum
v is the velocity
We have
[tex]m = \frac{630}{7} \\ [/tex]
We have the final answer as
90 kgHope this helps you
A 15kg block of frozen water is being acted upon
by two forces as shown. Which of the following
diagrams will have the smallest net acceleration?
A)
F2=10N
F =28N
B)
F=100N
Fi=90N
0)
Fi=4N
F2=12N
D)
Fi=150N
F2=140N
Answer:
C
Explanation:
I'm not 200% sure whether net acceleration would be F1 - F2 or F1 + F2, but C works in both scenarios. Either the net acceleration is 18 N, which is the lowest, or it is 8 N, which is also the lowest.
PLZ HELP DUE IN 5MINUTES
Answer:
Nitrogen is de solvent while others are the solute
At a objects highest point is the acceleration zero too?
Answer:
Acceleration from gravity is always constant and downward, but the direction and magnitude of velocity change. At the highest point in its trajectory, the ball has zero velocity, and the magnitude of velocity increases again as the ball falls back toward the earth
Explanation:
Answer:
No
Explanation:
becuse it's not even outer space there's acceleration there's no such thing as Zero acceleration speed except if you're not in motion.
Complete the statement below with all that apply.
Acceleration is
A. the slope of a velocity vs. time graph
Pector
B. a Vector
C. measured in m/s
D. the change in displacement divided by the change in time
Answer:
Acceleration is a vector, is measured in m/s, and A.
Explanation: SO BASICALLY, the answer to this question is A, B, and C. The last one would not fit the description of acceleration because it is describing Velocity.
Kinetic and potential energy are forms of what kind of energy?
gravitational
chemical
electrical
mechanical
Answer:
mechanical energy
Explanation:
The key difference that exists between kinetic energy and potential energy lies in the fact that, potential energy is that form of mechanical energy which is stored within an object, ready to be released as and when needed to do some work, while, kinetic energy is that form of mechanical energy that has been released and is associated with the body in motion.
A rescue pilot wishes to drop a package of emergency supplies so that it lands as close as possible to a target. If the plane travels with a velocity of 18 m/s and is flying 225 m above the target, how far away (horizontally) from the target must the rescue pilot drop the package?
Answer:
x = 121.86 m
Explanation:
It is given that,
The vertical velocity of a plane, [tex]v_x=18\ m/s[/tex]
It is flying above the target, h = 225 m
First we will find the time taken by the plane to reach the ground. It can be calculated using the second equation of motion as follow :
[tex]h=ut+\dfrac{1}{2}at^2[/tex]
Here, u = 0 and a = g
[tex]h=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2h}{g}} \\\\t=\sqrt{\dfrac{2\times 225}{9.81}} \\\\t=6.77\ s[/tex]
Let x is the horizontal distance from the target. It can be calculated as follows :
[tex]x=v_xt\\\\x=18\times 6.77\\\\x=121.86\ m[/tex]
So, the rescue pilot drop the package at a distance of 121.86 m from the target.
A football player sprints down the field for a touchdown traveling a total of
40 meters in 5 seconds. What was the football player's speed?
Answer:
Explanation:
It's a good thing to claim this was speed and not velocity.
Givens
d = 40 meters
t = 5 seconds
V = ??
Formula
v = d/t
Solution
v = 40 m/5 sec
v = 8 m/s
If you really wanted to get picky, you should convert the distance to yards which is how distance is measured in football
1.09 yards = 1 meter
d = 40 * 1.09 = 43.74 yards.
t = 5 seconds
v = 43.74/5 = 8.749 yards / second.
Define weight
Please help!!Thanks!!
Answer:
in science and engineering , the weight of an object is the force acting on the object due to gravity.
Given 1 inch ≡ 2.54 cm and 1 foot ≡
12 inches, how many square centimeters are
in 3.22 ft2
?
Answer:
2991.47 [cm^2]
Explanation:
To solve this problem we must perform a dimensional analysis and use the corresponding conversion values:
[tex]3.22[ft^{2}]*\frac{12^{2}in^{2} }{1^{2}ft^{2}} *\frac{2.54^{2}cm^{2} }{1^{2}in^{2} } \\2991.47[cm^{2}][/tex]
What is the oldest animal on earth?
Answer:
well on earth living are turtuls but just longest ied say dinos
Explanation:
Lincoln can run at a speed of 3 m/s. How long would it take him to run 200 meters?
Answer:Answer is 66.66666666666667
Explanation:all you have to do is divide 200/3
Answer:
66 seconds
Explanation:
time=distance/speed
200/3=66.6
A ball of mass 200 g rolls along the ground at a speed of 5.2 m/s. Calculate the kinetic energy of the ball.
Answer:
We have a mass of 200g (0.2kg) moving at 20m/s
Kinetic Energy KE = ½ mv^2 where m is mass and v is velocity
Actually, v is a vector quantity, so KE = ½ mv•v
The dot product of 2 vectors a and b is abCosθ where θ is the angle between the vectors.
Obviously v•v = v^2 Cos0 = v^2
In this case, we have KE = ½ (0.2)(20^2) = 40kg-m^2/s^2 = 40J
So we have kinetic energy in the amount of 40 Joules.
Explanation:
The right answer is "2.7 J"
Answer explanation:
Remember to convert grams to kilograms first by dividing by 1000.
Kinetic energy
= 1/2 × mass × speed2
= 1/2 × 0.2 kg × (5.2 m/s)^2
= 2.7 J (to 2 sig. fig.)
Hope it helps ✨✨
10. How do you use a triple-beam balance? Fill in the blanks.
1st – Place the film canister on the ________________.
2nd – Slide the large ________________ to the right until the arm drops below the line and then move it back one notch.
3rd – Repeat this process with the _________ weight. When the arm moves below the line, back it up one groove.
4th – Slide the ______________ weight on the front beam until the _____________ match up.
5th – Add the amounts on each beam to find the total __________ to the nearest tenth of a gram.
Answer:
1st – Place the film canister on the scale.
2nd – Slide the large weight to the right until the arm drops below the line and then move it back one notch.
3rd – Repeat this process with the top weight. When the arm moves below the line, back it up one groove.
4th – Slide the small weight on the front beam until the lines match up.
5th – Add the amounts on each beam to find the total mass to the nearest tenth of a gram.
Explanation:
The triple beam balance is an instrument that is used in measuring the mass of substances to a very high degree of precision. The reading error is given by ±0.05 grams. The triple beam balance as the name implies has three beams that measure substances of different mass levels.
The beams are categorized as small, medium, and large. There is a balance on which the substance to be weighed is placed directly upon. To use this measuring device, the procedures mentioned above are followed.
A projectile is launched with an initial velocity of v⃗ =(4m/s)x^+(3m/s)y^. What is the velocity of the projectile when it reaches its highest point?
Answer:
4m/sExplanation
Give the initial velocity of am object as v =(4m/s)xi+(3m/s)yj
From the expression;
Vy = 3m/s
Vx = 4m/s
At the maximum height, the velocity of the body is zero i.e Vy = 0m/s
The velocity of the projectile as it reaches its highest point will be:
v = (4m/s)xi + 0
v = √4²+0²
v = √16
v = 4m/s
Hence he velocity of the projectile when it reaches its highest point is 4m/s
When a car's velocity is positive and its acceleration is negative, what is happening to the car's motion?
-the car slows down
-The car speeds up.
-The car travels at constant speed.
-The car remains at rest.
Answer:
Assuming rightward is positive, the velocity is positive whenever the car is moving to the right, and the velocity is negative whenever the car is moving to the left. The acceleration points in the same direction as the velocity if the car is speeding up, and in the opposite direction if the car is slowing down.
Explanation:
Calculate the momentum of the skater with a mass of 45kg and a velocity of 3 m/s.
Answer:
90 kgm/s
Explanation:
A vehicle with a mass of 1250 kg travels at a speed of 113 km/h. What is the vehicle’s momentum?
Answer:
50 mph
Explanation:
The temperature of a 5.0 kg block increases by 3 degrees C when 2,000 J of thermal energy are added to the block. What is the specific heat of the block? _____________
Answer:
133.33J/kg°C
Explanation:
Given parameters:
Mass = 5kg
Temperature change = 3°C
Thermal energy = 2000J
Unknown:
Specific heat of the block = ?
Solution:
To find the specific heat capacity, use the formula below;
H = mCФ
where H is amount of heat
m is the mass
C is the specific heat capacity
Ф is the temperature change
Input the parameters and solve;
2000 = 5 x C x 3
C = [tex]\frac{2000}{15}[/tex]
C = 133.33J/kg°C
dimensional formula of energy
Answer:
[M L2 T-2]
Explanation:
hope this is what you're looking for.
A red rubber ball rolls down a hill from rest with an acceleration of 7.8 m/s 2 . How fast is it moving after it has traveled 5 m?
Answer:
8.83m
Explanation:
Given parameters:
Acceleration = 7.8m/s²
Initial velocity = 0m/s
distance covered = 5m
Unknown:
Final velocity = ?
Solution:
The equation to solve this problem with is given as;
V² = U² + 2aS
V is the final velocity
U is the initial velocity
a is the acceleration
S is the distance
Input the parameters and solve;
V² = 0² + 2 x 7.8 x 5 = 78
V = √78 = 8.83m
Do all the molecules of a liquid take part in evaporation? If not , explain.
Answer:
no
Explanation:
only the ones near the surface have enough kinetic energy
Answer:
no
Explanation:No, all the molecules of the liquid do not take part in evaporation only those molecules near the surface of liquid which acquire sufficient Kinetic energy (Thresold velocity) escape as they attractive forces of other molecules. Then other molecules come to the surface of the liquid and acquire more K.E. and escape the surface. This continues till all the liquid evaporates.
The density of gold is 19.3gm/ml . Express it's value in SI
Explanation:
Troy ounce 1 32.15075
Gram 31.1034768 1000
Kilogram 0.03110348 1
Tola (South Asia) 2.6666675 85.73535
a student pushes a book with a force of 5 N to the east.which statement
describes the reaction force?
Answer:
5N westward, acting on the student
Explanation:
Answer: 5N westward, acting on the student
Explanation:
Which energy source was developed through the invention of the atomic bomb?
Answer:
Nuclear energy
Explanation:
Tech A says that some electric actuators are positioned by an A/C ECU which checks the air flow with sensors. Tech B says that electric actuators are positioned by an A/C ECU and some actuators have a potentiometer to tell the A/C ECU the position of the door. Who is correct?
Answer:
Tech B
Explanation:
The control of electric actuators may be through through a two-wire or a five-wire circuit through the driver circuit by bidirectionally controlling via the motor wire polarity. The door position is determined by counting the actuator commutator pulses by the control module in the actuator with 2-wire, while the actuator with 5-wire uses potentiometer feedback.
The A/C ECU is the Air Condition Engine Control Unit.
