Question

How much force is needed to accelerate an object of mass 90 kg at a rate of 1.2 m/s2

Answer 1

∑F = ma = (90 kg)(1.2 m/s²) = 108 N = 100 N (1 significant digit)

Answer 2

Answer : The force needed is 108 N.

Explanation :

Force : It is defined as the product of mass of an object and acceleration of an object.

Formula used :

`Force=Mass* Acceleration`

Given:

Acceleration =
`1.2m/s^2`

Mass = 90 kg

Now put all the given values in this formula, we get:

`Force=90kg* 1.2m/s^2`

`Force=108kg.m/s^2=108N`

The unit of force is, N or
`kg.m/s^2`

Therefore, the force needed is 108 N.