﻿ A uniform force of (3 i + j) N acts on a particle of mass 2 kg. Hence the particle is displaced from position (2 i + k) m to position ( 4 i + 3 j - k) m. The work done by the force on the particle is, from Physics Motion in Straight Line Class 11 Manipur Board

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Motion in Straight Line

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A uniform force of (3 j) N acts on a particle of mass 2 kg. Hence the particle is displaced from position (2 k) m to position ( 4 + 3 k) m. The work done by the force on the particle is,

• 9 J

• 6 J

• 13 J

• 15 J

A.

9 J

Given,

Force, F = 3 i + j

r1 = ( 2 i + k) m

r2 = (4 i + 3 j - k) m

Therefore,

S = r2 - r1

Therefore,

W = F. s

= (3i + j). (2 i +3j - 2k)

= 3 x2 + 3x0

= 6 + 3 = 9 J

Given,

Force, F = 3 i + j

r1 = ( 2 i + k) m

r2 = (4 i + 3 j - k) m

Therefore,

S = r2 - r1

Therefore,

W = F. s

= (3i + j). (2 i +3j - 2k)

= 3 x2 + 3x0

= 6 + 3 = 9 J

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