Question

18. A car is moving at a constant velocity when it is involved in a collision. The car comes to rest after 0.450 s with an average acceleration of 60.0 m/s² in the direction opposite that of the car's velocity. What was the speed, in km/h, of the car before the collision? A) 29.2 km/h B) 44.8 km/h C) 97.2 km/h D) 105 km/h E) 144 km/h

          18. A car is moving at a constant velocity when it is involved in a collision. The car comes to rest after 0.450 s with an average acceleration of 60.0 m/s² in the direction opposite that of the car's velocity. What was the speed, in km/h, of the car before the collision?
A) 29.2 km/h
B) 44.8 km/h
C) 97.2 km/h
D) 105 km/h
E) 144 km/h

18. A car is moving at a constant velocity when it is involved in a collision. The car comes to rest after 0.450 s with an average acceleration of 60.0 m/s² in the direction opposite that of the car's velocity. What was the speed, in km/h, of the car before the collision?
A) 29.2 km/h
B) 44.8 km/h
C) 97.2 km/h
D) 105 km/h
E) 144 km/h

Added by Hailey C.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Pritesh Ranjan

11/05/2021

Step 1

- Time taken to come to rest, \( t = 0.450 \) s - Average acceleration, \( a = -60.0 \) m/s² (negative because it is in the direction opposite to the car's velocity) Show more…

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18. A car is moving at a constant velocity when it is involved in a collision. The car comes to rest after 0.450 s with an average acceleration of 60.0 m/s² in the direction opposite that of the car's velocity. What was the speed, in km/h, of the car before the collision? A) 29.2 km/h B) 44.8 km/h C) 97.2 km/h D) 105 km/h E) 144 km/h