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Class XI Physics Kinematics 7

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Question 1

Two particles start simultaneously from the same point and move along two straight lines, one with uniform velocity

and the other from rest with uniform acceleration

. Let α be the angle between their directions of motion. The relative velocity of the second particle with respect to the first is least after a time

Question 2

A pebble is thrown vertically upwards from bridge with an initial velocity of 4.9 m/s. It strikes the water after 2s. If acceleration due to gravity is 9.8 m/s². The height of the bridge & velocity with which the pebble strike the water will respectively be -

Question 3

A stone is released from an elevator going up with an acceleration a. The acceleration of the stone after the release is–

Question 4

A person walks along an east west street, and a graph of his displacement from home is shown in figure. His average velocity for the whole time interval is –

Question 5

A particle is confined to move along the x-axis between reflecting walls at x = 0 and x = a. Between these two limits it moves freely at constant velocity v. If the walls are perfectly reflecting, then its displacement time graph is -

Question 6

Figure shows the displacement time graph of a particle moving on the x-axis -

Question 7

A bowler throws a ball horizontally along east direction with speed of 144 km/hr. The batsman hits the ball such that it deviates from its initial direction of motion by 74 º north of east direction, without changing its speed. If mass of the ball is 1/3 kg and time of contact between bat and ball is 0.02 s. Average force applied by batsman on ball is

Question 8

Which of the following statements is false for a particle moving in a circle with a constant angular speed?

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May 7JEE & BITSAT