At the instant the traffic light turns green, an automobile starts with a constant acceleration of 2.1 m/s2. At the same instant a truck, traveling with a constant speed of 9.2 m/s, overtakes and passes the automobile. How far beyond the traffic signal will the automobile overtake the truck?
Correct answer: E. 80.6 m
- A. 40 m
- B. 30 m
- C. 90 m
- D. 120 m
- E. 80.6 m
Explanation
The correct option is 80.6 m i.e. option E. Following is the explanation.
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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