A fallen tree rose 2.75 m. Find the work done?

26.95 x m Joules

Explanation:

Given parameters:

Height of rise of tree = 2.75m

Unknown:

Work done by the tree = ?

Solution:

Work done by any body is the distance it moves as a result of applied force. It is expressed mathematically below;

   Work done = Force x distance moved

In this kind of problem,

  Distance moved = height of rise

  Force = weight of tree = m g

 Where m = mass of tree

             g = acceleration due to gravity = 9.8m/s²

 Now;

       W = mgh

        W = m x 9.8 x 2.75

        W = 26.95 x m Joules

Since m, the mass of the tree is not given, we cannot solve the problem completely

it has to be b, about 97 percent.

80cm/s.

24cm/s.

53.3cm/s.