Question

when a force of 70N acts on a certain object the acceleration of the object is 10 m/s^2. If the acceleration of the object becomes 3 m/s^2. what is the force

Answer 1

First let us find the mass of this objects

F= ma

where m is the mass

a is the acceleration

When F= 70 and a =10

substitute into the formula and solve for m

70 = m(10)

Divide both-side by 10

m = 7

when the acceleration becomes 3

Then substitute m=7 and a = 10 into the formula

F= 7(3)

F= 21 N