A boy pushed an object of mass 30kg across a horizontal floor through

1.	A boy pushed an object of mass 30kg across a horizontal floor through 20m. Another boy pushed the same body through 30m on the same floor with the same speed.(a) Who pushed a greater distance here? (b) What about the force applied (c) Who did the greater work? (d) Which is the factor influencing work here?
Answer» (a) Second boy (b) Force is same (c) Second boy done greater work (d) The Factor influencing work is displacement The factor affecting work done are force (F) and displacement (S) Equation for calculating work done Work W = Fs Unit of work is Joule (J), Kilojoule (KJ) 1KJ = 1000 J If a force of F newton is applied continuously on a body and the body undergoes a displacement of s metre in the direction of the force, then the work done by the applied force is W = Fs

A boy pushed an object of mass 30kg across a horizontal floor through 20m. Another boy pushed the same body through 30m on the same floor with the same speed.(a) Who pushed a greater distance here? (b) What about the force applied (c) Who did the greater work? (d) Which is the factor influencing work here?

Answer»

(a) Second boy

(b) Force is same

(d) The Factor influencing work is displacement

The factor affecting work done are force (F) and displacement (S)

Equation for calculating work done Work W = Fs

Unit of work is Joule (J), Kilojoule (KJ) 1KJ = 1000 J

If a force of F newton is applied continuously on a body and the body undergoes a displacement of s metre in the direction of the force, then the work done by the applied force is W = Fs

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