A 2000-kg car experiences a braking force of 8,000 N and skids to a stop in 5 seconds. The speed of the car just before the brakes were applied was
A) 20 m/s.
B) 1.25 m/s.
C) 300 m/s.
D) 45 m/s.
E) none of these
Answer: A
A 2000-kg car experiences a braking force of 8,000 N and skids to a stop in 5 seconds. The speed of the car just before the brakes were applied was
A) 20 m/s.
B) 1.25 m/s.
C) 300 m/s.
D) 45 m/s.
E) none of these
Answer: A