Question

What will be the force of impact on a rectangular body weighing 1200 lb and moving lengthwise at a constant speed of 3 miles per hour when the body hits a stationary wall at 90 degrees and when it hits the stationary wall at 45 degrees?

Answer 1

You cannot say what the force is unless you know how long the two bodies are in contact. In that case, you can only provide an average force.

A rock will impart a greater force than a ball of rubber of the same mass.