Answer:
c
Explanation:
The car travels with centripetal acceleration which is directed to the center of the circle but the velocity is changing since the car faces different direction as it travels in the circular direction. When the friction is zero between the tires of the car and the road, it will continue in the direction of its tangential velocity which will be along a straight-line path in its original direction.
If the billiard ball is going at the constant speed and contains its mass then the momentum WONT be changing. But realistically you have external forces like friction and air resistance changing the velocity thus changing the momentum. In this case momentum is not conserved because you're introduction an external force.
light
Explanation:
a computer has a screen and speakers, which produce light and siund
Answer:
The mass is 
Explanation:
Generally from Newton law for the first block
=> 
For the second block the force is 
and the acceleration is 
So from Newton law
=> 
substituting for a
=> 
=>
