Self Studies

Motion Test - 4...

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  • Question 1
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    A body is projected vertically upward with an initial velocity uu. If acceleration due to gravity is gg, the time for which it remains in air, is

  • Question 2
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    Give an example of motion in which average speed is not zero, but the average velocity is zero.

  • Question 3
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    A pebble is thrown vertically upwards with a speed of 20 ms120\ ms^{-1}. How high will it be after 2 s2\ s? (Take g=10 ms2g=10\ ms^{-2})

  • Question 4
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    A body is moving vertically upwards. Its velocity changes at a constant rate from 50ms150 m s^{-1} to 20ms120 m s^{-1} in 3 s. What is its acceleration ?

  • Question 5
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    A body falls from the top of a building and reaches the ground 2.5 s2.5  s later. How high is the building? (Take g=10 m s2g=10  m  {s}^{-2})

  • Question 6
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    A pebble thrown vertically upwards with an initial velocity 50 ms150 \ m s^{-1} comes to a stop in 5 s. Find the retardation assuming displacement in upwards direction to be positive.

  • Question 7
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    The velocity of an object increases at a constant rate from 20ms120 m s^{-1} to 50ms150 m s^{-1}in 10 s. Find the acceleration.

  • Question 8
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    A body is dropped from the top of a tower. It acquires a velocity of 20 ms120\ ms^{-1} on reaching the ground. Calculate the height of the tower. (Take g=10 ms2g=10\ ms^{-2})

  • Question 9
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    A stone is dropped freely from the top of a tower and it reaches the ground in 4 s4\ s. Taking g=10 ms2g=10\ ms^{-2}, calculate the height of the tower.

  • Question 10
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    An object falling freely from rest reaches ground in 2 s2  s. If acceleration due to gravity is 9.8 ms29.8  ms^{-2}, the velocity of object on reaching the ground will be

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