Question

A person walking down the hall is moving at .8 m/s with a momentum of 45.7 kg ∙ m/s. What is his mass?

Answer 1

Explanation:

Given:

mass of person = ?

momentum of person = 45.7 kg m/s

velocity of person = 8 m/s

Assuming the person is Walking in a straight line and neglecting air resistance:

then,

momentum = mass × velocity

=> 45.7 kg m/s = mass × 8 m/s

=> (45.7 kg m/s) / (8 m/s) = mass

=> 5.7 kg = mass

mass of person = 5.7 kg