A rock is thrown vertically upward from the origin of a reference frame. The roc

Question

A rock is thrown vertically upward from the origin of a reference frame. The rock reaches the peak of its trajectory and then it returns back to the origin where it comes to rest. Using the upward direction as positive, select True or False for the following statements.

The acceleration of the rock is negative throughout the whole motion.

The velocity of the rock is positive throughout the whole motion.

The position of the rock is positive or zero throughout the whole motion.

The acceleration of the rock is zero at the peak of the trajectory.

Explanation / Answer

1. True, gravity is constant 2. False, velocity is negative on the way down 3. True, the ball dosent travel behind the origin 4. False, only velocity is zero at the peak

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