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AP Physics 1
1.3 Representing Motion
1.2 Displacement, Velocity, and Acceleration
IntermediateMCQConceptual24.6k
A cart moving up a frictionless ramp before reaching its turnaround point.
A cart moving up a frictionless ramp before reaching its turnaround point.
A small cart is launched with an initial velocity directed up a long, frictionless ramp. The cart slides up the ramp, momentarily comes to rest at its highest point, and then slides back down the ramp. Two students discuss the kinematics of the cart at the exact instant it is at its highest point. Student 1 claims the cart is not accelerating at this instant because its velocity is zero. Student 2 claims the cart is accelerating at this instant because its velocity is changing. Which student is correct, and what is the proper justification?

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