A person of mass 89.70 kg escapes from the burning building, Ask an Expert

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Q1. A person of mass 89.70 kg escapes from the burning building by jumping from a window situated 27.50 m above a catching net.

The acceleration of gravity is 9.80 m/s2.

If air resistance exerts a force of 118.2 N on him as he falls,

determine his speed just before he hits the net.

React in units of m/s

Q2. A student who weighs 470 N is wearing a backpack that weighs 85 N. The student is standing still on level ground.

(a) What is the magnitude of the net force on student?

(b) What is the magnitude of the contact force on the student by backpack?

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Category:- Physics
Reference No.:- M9170833

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