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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics | 3rd Edition | ISBN: 9780321740908 | Authors: Randall D. Knight
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A stunt man drives a car at a speed of 20 m/s off a

Chapter 4, Problem 50P

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QUESTION:

Problem 50P

A stunt man drives a car at a speed of 20 m/s off a 30-m-high cliff. The road leading to the cliff is inclined upward at an angle of 20°.

a. How far from the base of the cliff does the car land?

b. What is the car’s impact speed?

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QUESTION:

Problem 50P

A stunt man drives a car at a speed of 20 m/s off a 30-m-high cliff. The road leading to the cliff is inclined upward at an angle of 20°.

a. How far from the base of the cliff does the car land?

b. What is the car’s impact speed?

ANSWER:

Step 1 of 2

Part a

We are required to calculate the distance at which the car lands from the base of the cliff.

The height of the cliff is 30 m.

The speed of the car is 20 m/s.

Therefore,

 s

 s

Therefore, the horizontal distance moved is

                                                                      m

                                                                       m

The car will land 61.45 m from the cliff’s base.

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