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Standard XI

Physics

Power, Force and Velocity

A 50 N force ...

Question

A $50 N$ force is applied to the body of $2 kg$ . This applied force maintains the velocity of the body at $2 m/s$ . If the body moves in perpendicular direction to the applied force, find the power delivered by the force.

100 W

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0 W

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50 W

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200 W

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Solution

The correct option is B $0 W$
Power is given by $P = F v cos θ$
Here, angle $(θ)$ between applied force and velocity is $90^{\circ}$
So, $P = 50 \times 2 \times cos 90^{\circ}$
$\Rightarrow P = 0 W$

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Power, Force and Velocity

Standard XI Physics

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A 50 N force is applied to the body of 2 kg. This applied force maintains the velocity of the body at 2 m/s. If the body moves in perpendicular direction to the applied force, find the power delivered by the force.

The correct option is B 0 WPower is given by P=Fvcosθ Here, angle (θ) between applied force and velocity is 90∘ So, P=50×2×cos90∘ ⇒P=0 W

A $50 N$ force is applied to the body of $2 kg$ . This applied force maintains the velocity of the body at $2 m/s$ . If the body moves in perpendicular direction to the applied force, find the power delivered by the force.

The correct option is B $0 W$
Power is given by $P = F v cos θ$
Here, angle $(θ)$ between applied force and velocity is $90^{\circ}$
So, $P = 50 \times 2 \times cos 90^{\circ}$
$\Rightarrow P = 0 W$