Alpha Question Bank for Engineering: Physics>Chapter 7 - Circular Motion>Exercise - 1>Q 20

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IMPORTANT

Earn 100

A body attached to a string of length $l$ describes a vertical circle such that it is just able to cross the highest point. Find the minimum velocity at the bottom of the circle.

Important Questions on Circular Motion

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IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 7 - Circular Motion>Exercise - 1>Q 22

Find the maximum speed at which a car can turn round a curve of

30 m

radius on a level road if the coefficient of friction between the tyres and the road is

0.4 [g = 10 m s^{- 2}] .

EASY

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IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 7 - Circular Motion>Exercise - 1>Q 23

A cyclist moving with a speed of

4.9 m s^{- 1}

on a level road can take a sharp circular turn of radius

4 m

, then find the minimum value of the coefficient of friction between the cycle tyres and road.

(g = 9.8 m s^{- 2})

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IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 7 - Circular Motion>Exercise - 1>Q 30

A particle moves along a circle of radius

(\frac{20}{π}) m

with a tangential acceleration of constant magnitude. If the speed of the particle is

80 m s^{- 1}

at the end of the second revolution after motion has begun, the tangential acceleration is:

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Alpha Question Bank for Engineering: Physics>Chapter 7 - Circular Motion>Exercise - 1>Q 31

During the circular motion with constant speed:

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Alpha Question Bank for Engineering: Physics>Chapter 7 - Circular Motion>Exercise - 1>Q 32

Two particles

P

and

Q

are located at distances

r_{P}

and

r_{Q}

, respectively, from the axis of a rotating disc such that

r_{P} > r_{Q}

. Then,

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IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 7 - Circular Motion>Exercise - 1>Q 33

Let

a_{r}

and

a_{t}

represent radial and tangential acceleration. The motion of a particle may be circular if:

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Alpha Question Bank for Engineering: Physics>Chapter 7 - Circular Motion>Exercise - 1>Q 34

A particle is going with constant speed along a uniform helical and spiral path separately as shown in figure. (in case $(a)$ , vertical acceleration of particle is negligible)

Question Image

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Alpha Question Bank for Engineering: Physics>Chapter 7 - Circular Motion>Exercise - 1>Q 35

If the radii of circular paths of two particles of the same masses are in the ratio of

1 : 2

, then in order to have the same centripetal force, their speeds should be in the ratio of: