Practice Problems 2 : 1. A work of \( 1000 J \) is done on a body in \( 4 s \), such that a displacement of \( 20 m \) is caused. Calculate (a) Force (b) Power. [(a) \( 50 N \) (b) \( 250 W ] \)

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HarshalMittal · Answer 1 · 2024-05-02T04:30:37+0000

Given,

Work done = 1000 J.

Time = 4 s.

Displacement = 20 m.

Find,

a) Force.

b) Work.

Formula used,

FORCE = WORK DONE ÷ DISPLACEMENT

POWER = WORK DONE ÷ TIME

(a) force

Force = ( 1000 J ) ÷ 20 m

Force = 100 / 2

Force = 50 N

(b) power

Power = ( 1000 J ) ÷ 4 s

Power = 250 Watt

Hence the Power = 250 Watt and Force = 50 N