Author Question: How much work must be done by frictional forces in slowing a 1000-kg car from 26.1m/s to rest? A) ... (Read 22 times)

Sufayan.ah · **on:** Jul 29, 2018

How much work must be done by frictional forces in slowing a 1000-kg car from 26.1m/s to rest?

A) 4.09 105 J B) 3.41 105 J C) 2.73 105 J D) 4.77 105 J

Question 2

Calculate the average force an outside object would have to exert to bring a 1200-kg car to rest in 15 cm when the car had an initial speed of 2.0 m/s (about 4.5 mph).

A) 1.8 104 N
B) 1.6 104 N
C) 5.4 104 N
D) 6.5 105 N
E) 3.2 104 N