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Work Done When Force Is Varying

2. Force acti...

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2. Force acting on a particle is (2i + 3j) N. Work done by thisforce is zero, when a particle is moved on the line3y+kx = 5. Here value of k is(a) 2(b) 4(c) 6(d) 8CO

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Q. Force acting on a particle is

(2 ¯ i + 3 ¯ j)

N. work done by this force is zero, when a particle is moved on the line 3y + kx = 5 Here value of k is

Q. Force acting on a particle is

(2 ¯ i + 3 ¯ j)

N. work done by this force is zero, when a particle is moved on the line 3y + kx = 5 Here value of k is

Q. A particle moves from a point

(- 2 ˆ i + 5 ˆ j)

(4 ˆ j + 3 ˆ k)

when a force of

(4 ˆ i + 3 ˆ j)

N

is applied. How much work has been done by the force ?

Q. Three forces

F_{1} = 2 ¯ i + ¯ j - ¯ ¯ ¯ k N, F_{2} = 2 ¯ i + 3 ¯ j - 3 ¯ ¯ ¯ k

F_{3} = a (¯ i + ¯ j - ¯ ¯ ¯ k)

N act simultaneously on a particle. The value of

^{'} a^{'}

so that the particle may be in equilibrium is:

F = - k x^{3}

is acting on a block moving along x-axis. Here, k is a positive constant. Work done by this force is:

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Work Done When Force Is Varying

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