Question

How does an applied force changes the speed of an object? Explain with example.​

Answer 1

Explanation:

It is one of the most important property of force that it changes the speed of a moving object. For Example: A car moves with a speed/velocity of 20 m/s and has a mass of 100 kg. Now, suddenly a force of 20 N is applied on the car for 5s. Then it'll have an:

F = ma

20 = 100*a

0.2 m/s² = Acceleration

So, due to the applied force, acceleration occurs and the speed/velocity will become:

v = u+at

v = 20+0.2*5

v = 20+1

v = 21 m/s

This is how force can change the speed of an object. In this example, a car which was moving at a speed of 20 m/s experienced a force of 20 N for 5 s and thus, its speed changed to 21 m/s.

Hope this helps.