Answer :

When the boy jumps from the building, the acceleration of boy as well as the box become g (acceleration due to gravity). Hence the net force is exerted by the earth and none of them exert any contact force.

Yes, the force greatly increases when he strikes on the ground because it becomes impulsive force and the boys head exerts a huge force which reduces the momentum of the box to zero in a very short period of time.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses

Figure <span langPhysics - Exemplar

Figure <span langPhysics - Exemplar

A block of known HC Verma - Concepts of Physics Part 1

The energy of a sHC Verma - Concepts of Physics Part 1