Answer: energy transfer. or, kinetic energy.
Explanation:
when something collides with another, it transfers kinetic energy to the other it collided with, making it move.
1. The signs of the velocities of the balls were changed, this is a result of the elastic collision between the two balls. The law involved in here is the Law of Interaction.
2. During the elastic collision, the momentum is conserved.
3. The velocity would be lower. There is a tendency for these balls to stick together.
B) It’s material moves due to convection currents.
Total distance = 15 kilometers and total displacement = 110 kilometers----- 60 kilometers - 45 kilometers = 15 kilometers 60 + 45 kilometers = 110 kilometers :)))))
Answer: a) Moment = 200N.m
b) F = 500N
Explanation: <u>Moment</u> or <u>Torque</u> is the tendency of a body to rotate because of an aplplied force. It can be calculated as

F is force applied
r is distance from the force to the point of rotation
θ is the angle formed between force and distance
a) Since F and r are perpendicular, θ=90°, sin90° = 1, so


200
<u>Torque</u><u> caused by weight of the barrier at the pivot is </u><u>200N.m</u>
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b) Counterweight has the same torque as pivot:
200
So, to find Force necessary to balance the weight:



F = 500
<u>It is necessary </u><u>a force of 500N</u><u> from the counterweight to balance the weight.</u>
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