Physics-
General
Easy

Question

A ball is dropped on the floor from a height of 10 blank m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is

  1. 2100 blank m divided by sec to the power of 2 end exponent invisible function application d o w n w a r d s  
  2. 2100 blank m divided by sec to the power of 2 end exponent invisible function application u p w a r d s blank  
  3. 1400 blank m divided by s e c to the power of 2 end exponent  
  4. 700 m divided by s e c to the power of 2 end exponent  

The correct answer is: 2100 blank m divided by sec to the power of 2 end exponent invisible function application u p w a r d s blank


    Velocity at the time of striking the floor,
    u equals square root of 2 g h subscript 1 end subscript end root equals square root of 2 cross times 9.8 cross times 10 end root equals 14 m divided by s
    Velocity with which it rebounds
    v equals square root of 2 g h subscript 2 end subscript end root equals square root of 2 cross times 9.8 cross times 2.5 end root equals 7 blank m divided by s
    therefore C h a n g e blank i n blank v e l o c i t y blank increment v equals 7 minus open parentheses negative 14 close parentheses equals 21 m divided by s
    therefore A c c e l e r a t i o n equals fraction numerator increment v over denominator increment t end fraction equals fraction numerator 21 over denominator 0.01 end fraction equals 2100 m divided by s to the power of 2 end exponent left parenthesis u p w a r d s right parenthesis

    Related Questions to study

    General
    Physics-

    A particle moving with a uniform acceleration travels 24 m and 64 m blankin the first two consecutive intervals of 4 s e c each.
    Its initial velocity is

    A particle moving with a uniform acceleration travels 24 m and 64 m blankin the first two consecutive intervals of 4 s e c each.
    Its initial velocity is

    Physics-General
    General
    Physics-

    A bullet is fired with a speed of 1000 blank m divided by s e c in order to hit a target 100 blank m away. If g equals 10 blank m divided by s to the power of 2 end exponent, the gun should be aimed

    A bullet is fired with a speed of 1000 blank m divided by s e c in order to hit a target 100 blank m away. If g equals 10 blank m divided by s to the power of 2 end exponent, the gun should be aimed

    Physics-General
    General
    Physics-

    From an elevated point A, a stone is projected vertically upwards. When the stone reaches a distance hbelow A, its velocity is double of what was at a height above A. The greatest height attained by the stone is

    From an elevated point A, a stone is projected vertically upwards. When the stone reaches a distance hbelow A, its velocity is double of what was at a height above A. The greatest height attained by the stone is

    Physics-General
    parallel
    General
    Physics-

    Two bodies being a free fall from rest, from the same height 2s apart. How long after the first body begins to fall the two bodies will be 40m apart? (Take g equals 10 m s to the power of negative 2 end exponent)

    Two bodies being a free fall from rest, from the same height 2s apart. How long after the first body begins to fall the two bodies will be 40m apart? (Take g equals 10 m s to the power of negative 2 end exponent)

    Physics-General
    General
    Physics-

    The velocity of a body of mass 20 kg decreases from 20 blank m s to the power of negative 1 end exponent t o blank 5 blank m s to the power of negative 1 end exponent in a distance of 100 m. Force on the body is

    The velocity of a body of mass 20 kg decreases from 20 blank m s to the power of negative 1 end exponent t o blank 5 blank m s to the power of negative 1 end exponent in a distance of 100 m. Force on the body is

    Physics-General
    General
    Physics-

    The displacement of the particle varies with time according to the relation x equals fraction numerator k over denominator b end fraction open square brackets 1 minus e to the power of negative b t end exponent close square brackets.Then the velocity of the particle is

    The displacement of the particle varies with time according to the relation x equals fraction numerator k over denominator b end fraction open square brackets 1 minus e to the power of negative b t end exponent close square brackets.Then the velocity of the particle is

    Physics-General
    parallel
    General
    Physics-

    A train starts from station with an acceleration 1 m s to the power of negative 2 end exponent. A boy is 48 m behind the train with a constant velocity 10 m s to the power of negative 1 end exponent, the minimum time after which the boy will catch the train is

    A train starts from station with an acceleration 1 m s to the power of negative 2 end exponent. A boy is 48 m behind the train with a constant velocity 10 m s to the power of negative 1 end exponent, the minimum time after which the boy will catch the train is

    Physics-General
    General
    Physics-

    A particle starts from rest at t equals 0 and undergoes an acceleration a in m s to the power of negative 2 end exponent with time t in seconds which is as shown Which one of the following plot represents velocity V in m s to the power of negative 1 end exponent versus time t in seconds

    A particle starts from rest at t equals 0 and undergoes an acceleration a in m s to the power of negative 2 end exponent with time t in seconds which is as shown Which one of the following plot represents velocity V in m s to the power of negative 1 end exponent versus time t in seconds

    Physics-General
    General
    Physics-

    A particle is thrown vertically upwards. If it velocity at half of the maximum height is 10 blank m divided by s e c, then maximum height attained by it is (Take g equals 10 blank m divided by sec to the power of 2 end exponent invisible function application blank)

    A particle is thrown vertically upwards. If it velocity at half of the maximum height is 10 blank m divided by s e c, then maximum height attained by it is (Take g equals 10 blank m divided by sec to the power of 2 end exponent invisible function application blank)

    Physics-General
    parallel
    General
    Physics-

    The area under acceleration-time graph gives

    The area under acceleration-time graph gives

    Physics-General
    General
    Physics-

    If a freely falling body travels in the last second a distance equal to the distance travelled by it in the first three second, the time of the travel is

    If a freely falling body travels in the last second a distance equal to the distance travelled by it in the first three second, the time of the travel is

    Physics-General
    General
    Physics-

    A 120 blank mlong train is moving in a direction with speed 20 blank m divided by s. A train B moving with 30 blank m divided by s in the opposite direction and 130 blank m long crosses the first train in a time

    A 120 blank mlong train is moving in a direction with speed 20 blank m divided by s. A train B moving with 30 blank m divided by s in the opposite direction and 130 blank m long crosses the first train in a time

    Physics-General
    parallel
    General
    Physics-

    From a balloon rising vertically upwards as 5 blank m s to the power of negative 1 end exponent a stone is thrown up at 10 blank m s to the power of negative 1 end exponent relative to the balloon. Its velocity with respect to ground after 2 s is
    open parentheses a s s u m e blank g equals 10 blank m s to the power of negative 2 end exponent close parentheses

    From a balloon rising vertically upwards as 5 blank m s to the power of negative 1 end exponent a stone is thrown up at 10 blank m s to the power of negative 1 end exponent relative to the balloon. Its velocity with respect to ground after 2 s is
    open parentheses a s s u m e blank g equals 10 blank m s to the power of negative 2 end exponent close parentheses

    Physics-General
    General
    Physics-

    A body is thrown vertically up from the ground. It reaches a maximum height of 100 m in 5 s e c. After what time it will reach the ground from the maximum height position

    A body is thrown vertically up from the ground. It reaches a maximum height of 100 m in 5 s e c. After what time it will reach the ground from the maximum height position

    Physics-General
    General
    Physics-

    A particle starts from rest and experiences constant acceleration for 6 s. if it travels a distance d subscript 1 end subscript in the first two second, a distance d subscript 2 end subscript in the next two seconds and a distance d subscript 3 end subscript in the last two second, then

    A particle starts from rest and experiences constant acceleration for 6 s. if it travels a distance d subscript 1 end subscript in the first two second, a distance d subscript 2 end subscript in the next two seconds and a distance d subscript 3 end subscript in the last two second, then

    Physics-General
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.