1.

A body of 0.5 kg thrown upwards reaches a maximum height of 5 m. Calculate the work done by the force of gravity during this vertical displacement.

Answer»

Given: 

Mass (m) = 0.5 kg 

Acceleration due to gravity (g) = -9.8 m/s2 

Displacement (s) = 5 m. 

To Find: 

Work done (W) = ? 

Formula: 

W = P.E = mgh 

Solution: 

W = mgh 

= 0.5 x (-9.8) x 5 

= -24.5 J

The work done by the force of gravity is -24.5 joule.



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