Acart is rolling across the floor at a constant velocity of 2 m/s to the right. the cart is pushed again to the right, and it starts to accelerate. how are the force of the push and acceleration of the cart related?
a. the force and acceleration are not related.
b. the force of gravity makes the car accelerate.
c. the balanced push causes the cart to accelerate.
d. the unbalanced push causes the cart to accelerate.

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)