Work

IMPORTANT

Work: Overview

This topic covers concepts, such as, Work, Work, Power and Energy & Zero Work etc.

Important Questions on Work

EASY
IMPORTANT

What should the angle be between force F and displacement S in order for work done to be zero?

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When a body is moving on a horizontal surface, work done by the gravity( gravitational force) is _____.

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Which of the following is not the unit of work?

MEDIUM
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When a coil spring is compressed, the work is done on the spring. The elastic potential energy .....

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The work done will be zero if the angle between the force and distance is .....

MEDIUM
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How much work is done to lift a 4 kg block to a point 2m above its resting location? (g = 9.8 m/s2)

MEDIUM
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A 5 kg box slides down a ramp a distance of two meters before it reaches the ground. The ramp has an angle of 30°. What is the work done by gravity on the box?

MEDIUM
IMPORTANT

A heater coil connected to a supply of a 220 V is dissipating some power \( P_1 \) . The coil is cut into half and the two halves are connected in parallel. The heater now dissipates a power \( P_2 \). Find the ratio of power \( P_1 \) : \( P_2 \).