When a mass of $10 kg$ from point A is moved to point B on a table in a horizontal line, the work done on the object by the force of gravity is

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- 5 J

- 10 J

0 J

1000 J

answer is C.

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Detailed Solution

When a mass of

10 kg

from point A is moved to point B on a table in a horizontal line, the work done on the object by the force of gravity is

0 J .

Work is defined as “the energy transferred to or from an object via the application of force along a displacement.” It is a product of force

(F)

applied in the direction of movement and displacement

(s)

. Mathematically, Work

(W)

is represented as

W = F scosθ

where,

θ

is the angle between force applied and displacement caused.
According to the question, the displacement is in the horizontal direction. But, the force of gravity acts in the vertically downward direction. Therefore, the angle between the force and the direction of displacement is