What is Bad friction?

Bad friction can be explained two ways:

Explanation:

1. The main disadvantage of friction is that it produces heat in various parts of machines. In this way some useful energy is wasted as heat energy.

2. Due to friction we have to exert more power in machines.

We have the equation of motion

                          , where v is the final velocity, u is the initial velocity, a is the acceleration and s is the displacement.

In this case initial velocity = 2.20 m/s, final velocity = 0 m/s, displacement = 14 m

On substitution we will get 0 =

On solving we can find the acceleration value as -0.173

So free fall acceleration = 0.173