Question

A worker with spikes on his shoes applies a constant horizontal force of 20 N to push a 40-kg box across a frictionless, frozen lake. What is the acceleration of the box?

2.0 m/s^2
0.5 m/s^2
4.1 m/s^2
8.0 m/s^2

Answer 1

0.5m/s2

Step-by-step explanation:

because since newtons third law states that f=ma

hence force is 20N and m=40kg

hence by substituting in formula we get a=0.5m/s2

Answer 2

The acceleration of the box will be
`{\bold0.5 m/s^2.}`

Step-by-step explanation:

Given:

Constant horizontal force on the box= 20 N

Mass of the box=40kg

To Find:

Acceleration of the box=?

Solution:

According to Newton's Second Law,

Force = Mass x Acceleration

On substituting the values,

`20 = 40 * Acceleration`

Solving the equation for Acceleration

`20 = 40 * Acceleration`

`Acceleration= (1)/(2)`

`Acceleration = 0.5 m/s^2`