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#28-Vertical-Non-Uniform-Circular-Motion-2
(Physics) > Laws of Motion
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Related Practice Questions :

Let $\theta$ denote the angular displacement of a simple pendulum oscillating in a vertical plane. If the mass of bob is m. The tension in the string is mg cos $\theta$

1.  always

2.  never

3.  at extreme

4.  at mean position

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Difficulty Level:

A particle is moving in a vertical circle. The tension in the string when passing through two positions at anele of 30$°$ and 60$°$ from vertical (the lowest position) are respectively, then:

1.

2.

3.

4.  Tension in the string always remains the same.

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Difficulty Level:

What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?

(a)$\sqrt{2\mathrm{gR}}$
(b)$\sqrt{3gR}$
(c)$\sqrt{5gR}$
(d)$\sqrt{gR}$

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Difficulty Level:

A roller coaster is designed such that riders experience "weightlessness" as they go round the top of a hill whose radius of curvature is 20m. The speed of the car at the top of the hill is between

1. 14m/s and 15m/s

2. 15m/s and 16m/s

3. 16m/s and 17m/s

4. 13m/s and 14m/s