In which of the following scenarios the state of motion of an object is not changed?

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An archer shooting an arrow

A footballer kicking a football to change its direction.

A fielder catching a ball while playing cricket.

A spacecraft moving at a constant speed in a constant direction in space.

answer is D.

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Detailed Solution

An object's state of motion is said to be changed when its speed or direction is changed.

When an archer applies force on an arrow, the arrow at rest starts moving towards the target.
When a footballer applies force on a ball, its direction is changed.
When a fielder catches a ball the speed of the ball is reduced due to the force applied to the ball.
When a spacecraft is moving in space with constant speed and direction, there is no change in the state of the motion of the spacecraft.

Therefore, 'A spacecraft moving at a constant speed in a constant direction in space.' is the correct response.

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