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Q.

A lift is ascending with decreasing speed. What are the directions of velocity and acceleration of the lift at the given instant.

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a

Direction of velocity is downward ..

Speed of lift is decreasing. So, direction of acceleration should be in opposite direction or it should be downwards.

b

Direction of motion is the direction of velocity, Lift is ascending (means it is moving upwards). So, direction of velocity is upwards.

Speed of lift is decreasing. So, direction of acceleration should be in opposite direction or it should be downwards

c

Both 1 and 2

d

None of the above

answer is B.

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Detailed Solution

Direction of motion is the direction of velocity, Lift is ascending (means it is moving upwards). So, direction of velocity is upwards.

Speed of lift is decreasing. So, direction of acceleration should be in opposite direction or it should be downwards

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