Answer:
a. Acceleration, a = 1.88 m/s²
b. Time, t = 7.87 seconds.
Explanation:
Given the following data;
Initial velocity, U = 14.5m/s
Final velocity, V = 29.3m/s
Distance, S = 172m
a. To find the acceleration of the speedboat;
We would use the third equation of motion;
V² = U² + 2aS
Substituting into the formula
29.3² = 14.5² + 2a*172
858.49 = 210.25 + 344a
344a = 858.49 - 210.25
344a = 648.24
a = 648.24/344
Acceleration, a = 1.88 m/s²
b. To find the time;
We would use the first equation of motion;
V = U + at
29.3 = 14.5 + 1.88t
1.88t = 29.3 - 14.5
1.88t = 14.8
Time, t = 14.8/1.88
Time, t = 7.87 seconds.
What is the force two changed objects exert on one another if they are 9 meters apart and one has a charge of 2.5 x 10^-6 C and the second has a charge 0f 4.5 x 10^-7 C
Answer:
The force exerted between the two charges is 0.0001248N
Explanation:
we will be using Columb's law to solve this problem.
Columb's law explains that the Force between two charged bodies is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.
Mathematically,
[tex]F = K\frac{Q_1 \times Q_2}{r^2}[/tex]
WHere K = constant of proportionality = [tex]8.9875 \times 10^9 N m^2/c^2[/tex]
[tex]F = 8.9875 \times 10^9 \times\frac{2.5 \times10^{-6} \times 4.5 \times 10^{-7}}{9^2}= 0.0001248N[/tex]
The force exerted between the two charges is 0.0001248N
ILL MARK BRAINLIEST
PLEASE HELP
2.Write the formula associating energy with power
3.Write the formula associating potential energy with height.
(PLEASE HELP ASAP )
Explanation:
2. Power is defined as the rate of doing work. Mathematically, it can be given by :
[tex]P=\dfrac{W}{t}[/tex]
Where
W is work done or energy
t is the time taken
3. The formula of potential energy can be given by :
[tex]P=mgh[/tex]
Where
m is the mass of the object
g is the acceleration due to gravity
h is height
Hence, this is the required solution.
13.If a jet plane with a velocity of 20 m/s at t = 0 accelerates at a rate of 40 m/s²
for 3 seconds, what is its veloaty at time = 3 seconds?
Answer:
140m/s
Explanation:
V=V0+at. V=20+40*3=140m/s
5. Relationships in a community can be cooperative or competitive.
True
False
Answer:
True
Explanation:
is the correct answer
Answer:
This is True
Explanation:
Communities cooperate by simply co-existing and working together to benefit the community and offering their goods and services. Some programs in a community offer social work, like volunteering and charities, which help people in need in a community.
They can also be competitive because there are lots of the same goods and services offered throughout the city, so businesses have to compete for sales to attract consumers in the communities.
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why are the effects of collision different if the forces on the object is the same
Answer:
When two objects collide, a force is exerted on each object. The two forces are in opposite directions but the same strength. Even though the force on each object in a collision is the same strength, the objects will have different velocity changes if their masses are different.
Explanation:
*sighs* can u please give me brainliest-..... I'm literally crying....lol but PLEASE BRAINLIEST PLEASEEEE T_T
Two runners ran side by side, each holding one end of a horizontal pole. How would this affect the direction of the runners? Explain.
Answer:
They will run parallel to each other as the none of a straight pole cannot be bent in such a way where one side can turn without the other turning.
laser light has a great deal of______ a. chemical b. heat c. potential d. sound energy.??
Answer:
b. heat
Explanation:
Laser light has a great deal of heat energy. The correct option is B.
What is laser light?A laser is a device that emits light via an optical amplification process that is based on the stimulated emission of electromagnetic radiation. Light amplification by stimulated emission of radiation is an acronym for the term.
A laser generates a very narrow beam of light that can be used in a variety of technologies and instruments. Laser is an acronym that stands for Light Amplification by Stimulated Emission of Radiation.
The radiation coming from the laser light has a large amount of heat due to the presence of the electrons streamed in the form of an electromagnetic wave.
To know more about laser light follow
https://brainly.com/question/27857432
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how long will it take for a car at rest to accelerate at 7m/s^2 to a speed of 45 m/s
What is the momentum of a tank with a mass of 3,500 kg and a velocity of 6 m/s?
Answer: 21000 kg*m/s
Explanation: Momentum is mass times velocity or p=mv where p represents momentum so...
3,500kg*6m/s= 21,000kg*m/s
Please do it hurry!!!
Answer:
Group D
Explanation:
Sound waves through gases travel slowly because of how spread out they are.
Please help although I think I have the awnser but correct me if I’m wrong
I believe you got it correct already
You ride your bike 5 miles east to school, then 2 miles east to Wawa, return to school, then ride 2 miles west to the library to work on your homework. What is your displacement?
Answer:
3 miles
Explanation:
5 + 2 - 2 - 2 = 3 miles
Putting the moon back to its original size, if it were suddenly to move to twice the
distance from the earth, how would that effect the force of gravitation with the
earth?
A person ties a 2.5 g ball to the end of a 200 cm rope and swings it around in a circle directly over their head. It takes the ball 1.2 seconds to move around the circle one time.
What type of force provides the centripetal force?
Answer:
your answer is at Cbsd.org
