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An object is said to be in motion if its position _____ with respect to another object.

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Important Questions on Primary Concept of Force and Energy

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Pick the odd one out. Give scientific reason for your answer.

Table, chair, flying bird, tree

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The objects which do not change their position with time are said to be.
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The girl is _____ with respect to the bicycle. (in motion / at rest)

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A bullet loses 120 of its velocity after penetrating a plank. How many planks are required to stop the bullet?

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What happens to the speed of a moving object when force is applied to it?

MEDIUM
Which of the following deals with bodies at rest?
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The girl on the swing is _____ with respect to the seat of the swing. (in motion / at rest)

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A book lying on a table is an example of :
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What could be the possible consequences when an equal amount of force is applied to an object from two opposite directions?

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Which of the following shows the velocity (v) - time (t) graph for falling apple?

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Which of the following changes are possible, when a force is applied to an object?

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Change in the state of motion means

MEDIUM

Choose the correct option. 

Which of the following objects is not at rest with respect to the Earth? 

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The girl on the bicycle is _____ with respect to the road. (in motion / at rest)

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Which object (both the balls P and Q have the same mass) has greater potential energy?
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An object is said to be at _____ if its position does not change with time.
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The girl is _____ with respect to the garden. (in motion / at rest)

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What will happen if the direction of the force applied is opposite to the movement of an object?

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What will happen if the force applied to an object is in the direction of its motion?