7) A 10 kg cart is moving across a frictionless floor at 2.0 m/s. A 40 kg boy, riding in the cart, jumps off so that he hits the floor with zero velocity.
a. What impulse did the boy give to the cart?
b. What was the velocity of the cart after the boy jumped?

An experiment is designed to test the relationship between the initial height of a basketball before it is dropped to the height of its rebound bounce. the height of the rebound bounce is measured using a scale positioned behind the ball. in the above experiment, which condition would not be controlled? a). the starting height of the ballb). the surface the ball bounces on c). the type of ball d). the method to measure the rebound height of the ball

An electric current is flowing through the cord below.what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.

True or false graphs must include scales that increase by the same amount