Circular Motion · Physics · AP EAPCET

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MCQ (Single Correct Answer)

1
The centripetal acceleration of a particle in uniform circular motion is $18 \mathrm{~ms}^{-2}$. If the radius of the circular path is 50 cm , the change in velocity of the particle in a time of $\frac{\pi}{18} \mathrm{~s}$ is
AP EAPCET 2024 - 21th May Morning Shift
2
A particle revolving in a circular path travels the first half of the circumference in 4 s and the next half in 2 s . What is its average angular velocity?
AP EAPCET 2024 - 20th May Evening Shift
3
A small disc is on the top of a smooth hemisphere of radius $R$. The smallest horizontal velocity $v$ that should be imparted to the disc, so that disc leaves the hemisphere surface without sliding down is ( there is no friction )
AP EAPCET 2024 - 20th May Evening Shift
4
A wheel of angular speed $600 \mathrm{rev} / \mathrm{min}$ in is made to slow down at a rate of $2 \mathrm{rad} \mathrm{s}^{-2}$. The number of revolutions made by the wheel before coming to rest is
AP EAPCET 2024 - 18th May Morning Shift
5

A body of mass 10 kg is attached to a wire of 0.3 m length. The breaking stress is 4.8 $$\times$$ 10$$^7$$ Nm$$^{-2}$$. The area of cross-section from the wire is 10$$^{-6}$$ m$$^{2}$$. The maximum angular velocity with which it can be rotated in a horizontal circle is

AP EAPCET 2021 - 20th August Morning Shift
6

A 500 kg car takes a round turn of radius 50 m with a velocity of 36 km/h. The centripetal force acting on the car is

AP EAPCET 2021 - 19th August Evening Shift
7

A motor cyclist wants to drive in horizontal circles on the vertical inner surface of a large cylindrical wooden well of radius $$8.0 \mathrm{~m}$$, with minimum speed of $$5 \sqrt{5} \mathrm{~ms}^{-1}$$. The minimum value of coefficient of friction between the tyres and the wall of the well must be $$\left(g=10 \mathrm{~ms}^{-2}\right)$$

AP EAPCET 2021 - 19th August Evening Shift
8

Assertion (A) Two identical trains move in opposite senses in equatorial plane with same speeds relative to the Earth’s surface. They have equal magnitude of normal reaction.

Reason (R) The trains have different centripetal accelerations due to different speeds.

AP EAPCET 2021 - 19th August Morning Shift
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