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

Answer:

0.5m/s2

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${\bold0.5 m/s^2.}$

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,

$20 = 40 \times Acceleration$

Solving the equation for Acceleration

$20 = 40 \times Acceleration$

$Acceleration= \frac{1}{2}$

$Acceleration = 0.5 m/s^2$