Question

A 975-kg van decelerates to rest from a speed of 82.5 km/h in a distance of 150 m. Presume the van is initially traveling in the positive direction.

A )If the brakes are the only thing making the van come to a stop, calculate the force (in newtons, in a component along the direction of motion of the van) that the brakes apply on the van.

B) Suppose instead of braking that the van hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force, in newtons, exerted on the van in this case.

C) What is the ratio of the force on the van from the concrete to the braking force?

Answer 1