AP EAPCET 2024 - 19th May Evening Shift | Center of Mass and Collision Question 20 | Physics

A ball falls freely from rest on to a hard horizontal floor and repeatedly bounces. If the velocity of the ball just before the first bounce is $7 \mathrm{~ms}^{-1}$ and the coefficient of restitution is 0.75 , the total distance travelled by the ball before it comes to rest is (acceleration due to gravity $=10 \mathrm{~ms}^{-2}$ )

10.75 m

9.75 m

8.75 m

11.75 m

AP EAPCET 2024 - 19th May Evening Shift

MCQ (Single Correct Answer)

-0

Two blocks of masses $m$ and $2 m$ are connected by a massless string which passes over a fixed frictionless pulley. If the system of blocks is released from rest, the speed of the centre of mass of the system of two blocks after a time of 5.4 s is (acceleration due to gravity $=10 \mathrm{~ms}^{-2}$ )

$18 \mathrm{~ms}^{-1}$

$8 \mathrm{~ms}^{-1}$

$4 \mathrm{~ms}^{-1}$

$12 \mathrm{~ms}^{-1}$

AP EAPCET 2024 - 18th May Morning Shift

MCQ (Single Correct Answer)

-0

In an inclastic collision, after collision the kinetic energy

increases by 2 times

is less than before collision

is more than before collision

remains same

AP EAPCET 2022 - 5th July Morning Shift

MCQ (Single Correct Answer)

-0

Ball $$A$$ of mass 1 kg moving along a straight line with a velocity of $$4 \mathrm{~ms}^{-1}$$ hits another ball $$B$$ of mass 3 kg which is at rest. After collision, they stick together and move with the same velocity along the same straight line. If the time of impact of the collision is 0.1 s then the force exerted on $$B$$ is

30 N

24 N

36 N

27 N

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