(B) For work to be done on an object when a force is applied,the object must undergo a displacement in a direction that is not perpendicular to the di

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The object must move in a direction not perpendicular to the force.

(B) For work to be done on an object when a force is applied,the object must undergo a displacement in a direction that is not perpendicular to the direction of the applied force. Mathematically,work is defined as $W = \vec{F} \cdot \vec{d} = Fd \cos \theta$. For $W \neq 0$,the displacement $\vec{d}$ must have a component along the force $\vec{F}$,meaning $\theta \neq 90^{\circ}$.

Class 11 Physics Work, Energy, Power and Collision Work Done by Constant Force

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What is required for work to be done when a force is applied to an object?

A
The object must move in the direction of the force.
B
The object must move in a direction not perpendicular to the force.
C
The object must remain stationary.
D
The force must be zero.

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Work, Energy, Power and Collision

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Work Done by Constant Force

When a force of $50 \, N$ is applied to an object,it undergoes a displacement of $10 \, m$ at an angle of $60^\circ$ with the direction of the force. The work done is ......... $J$.

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$A$ man pushes a wall and fails to displace it. He does:

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$A$ string is used to pull a block of mass $m$ vertically up by a distance $h$ at a constant acceleration $\frac{g}{4}$. The work done by the tension in the string is ...............

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$A$ force of magnitude $50\, N$ acting along $\hat{i} + \hat{j} + \hat{k}$ displaces a point mass from $(5, 9, 7)$ to $(4, 8, 6)$. The work done by this force during this displacement is:

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If a person is pushing a box inside a moving train,the work done in the frame of the earth will be: (where $\vec{s}$ is the displacement of the box in the train and $\vec{s}_0$ is the displacement of the train relative to the ground)

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What is required for work to be done when a force is applied to an object?

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When a force of $50 \, N$ is applied to an object,it undergoes a displacement of $10 \, m$ at an angle of $60^\circ$ with the direction of the force. The work done is ......... $J$.

$A$ man pushes a wall and fails to displace it. He does:

$A$ string is used to pull a block of mass $m$ vertically up by a distance $h$ at a constant acceleration $\frac{g}{4}$. The work done by the tension in the string is ...............

$A$ force of magnitude $50\, N$ acting along $\hat{i} + \hat{j} + \hat{k}$ displaces a point mass from $(5, 9, 7)$ to $(4, 8, 6)$. The work done by this force during this displacement is:

If a person is pushing a box inside a moving train,the work done in the frame of the earth will be: (where $\vec{s}$ is the displacement of the box in the train and $\vec{s}_0$ is the displacement of the train relative to the ground)

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