What is the mass of a falling rock if it hits the ground with a force of 147 N?

1 Answer
Mar 1, 2017

#m=15kg#

Explanation:

Force is given by Newton's second law as the product of an object's mass and acceleration, #vecF=mveca#.

We are given that #vecF=147N# (downward), and we know that the acceleration of an object in free-fall is equal to #-g#, or #-9.8m/s^2#. We can rearrange the equation for force to solve for mass.

#=>m=(F/a)#

#=(-147N)/(-9.8m/s^2)#

#=15kg#