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A diver initially moving horizontally with speed v dives off the edge of a vertical cliff and lands in the water a distance d from the base of the cliff. How far from the base of the cliff would the diver have landed if the diver initially had been moving horizontally with speed 2v?

d

2d

2d

4d

It cannot be determined unless the height of the cliff is known.

A baseball player throws a ball horizontally. Which statement best describes the ball's motion after it is thrown? [Neglect the effect of air resistance.]

Its vertical speed remains the same, and its horizontal speed increases.

Its vertical speed remains the same, and its horizontal speed remains the same.

Its vertical speed increases, and its horizontal speed increases.

Its vertical speed increases, and its horizontal speed remains the same.

Its vertical speed increases and its horizontal speed decreases.

In a lab experiment, a sphere is rolled down a ramp so that it leaves the edge of the table with a horizontal velocity v. If the table has a height h above the ground, how far from the edge of table, a distance x, does the sphere land? You may neglect air resistance in this problem.

2v2g

2hg

v

2vhg

2hg

None of the answers are correct

A rock is thrown into the air at an angle relative to the vertical and follows the path shown above. Air resistance is negligible. What is the direction of the net acceleration of the rock at point D?

to the left

to the right

straight up

straight down

The rock's acceleration is zero at point D

A ball is thrown and follows the parabolic path shown above. Air friction is negligible. Point Q is the highest point on the path. Points P and R are the same height above the ground.

VP < VQ < VR

VR > VQ > VP

VQ < VR < VP

VQ < VP = VR

VP = VR < VQ