Question

A 2 kg mass starts from rest and slides down an inclined plane 4 m long in 1 second. What net force is acting on the mass along the incline *.

Answer 1

The net force acting on the mass along the incline is equal to 16 Newton.

Given the following data:

• Mass = 2 kg

• Distance = 4 meters

• Time = 1 seconds

To determine the net force acting on the mass along the incline:

First of all, we would find the acceleration of the mass by using the second equation of motion:

$S = ut+ \frac{1}{2} at^2\\\\4 = 0(1) + \frac{1}{2} a(1)^2\\\\4=\frac{a}{2}\\\\a=2\times 4$

Acceleration, a = 8 $m/s^2$

For the net force, we would apply Newton's Second Law of Motion:

$F_{net} = mass \times acceleration\\\\F_{net} =2 \times 8$

Net force = 16 Newton.

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