# Question #2cc01

##### 1 Answer

Dec 26, 2016

#### Answer:

a) The initial kinetic energy is 453 600 J.

b) The stopping distance is 648 m

c) Acceleration while stopping averages

#### Explanation:

a) The initial kinetic energy is a matter of the mass and the initial speed, and does not depend on the way in which the truck came to a halt.

b) The stopping distance is found by using conservation of energy to change the kinetic energy to frictional heat

Since the final kinetic energy is zero, the change in K is -453 600 J

c) To find acceleration, use an equation of motion