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# Circular Motion NAT Level - 1

## 10 Questions MCQ Test Topic wise Tests for IIT JAM Physics | Circular Motion NAT Level - 1

Description
This mock test of Circular Motion NAT Level - 1 for Physics helps you for every Physics entrance exam. This contains 10 Multiple Choice Questions for Physics Circular Motion NAT Level - 1 (mcq) to study with solutions a complete question bank. The solved questions answers in this Circular Motion NAT Level - 1 quiz give you a good mix of easy questions and tough questions. Physics students definitely take this Circular Motion NAT Level - 1 exercise for a better result in the exam. You can find other Circular Motion NAT Level - 1 extra questions, long questions & short questions for Physics on EduRev as well by searching above.
*Answer can only contain numeric values
QUESTION: 1

### A particle moves along a circle of radius (20/π)m with tangential acceleration of constant magnitude. If the speed of the particle is 80 m/s at the end of the second revolution after motion has begun. What will be the tangential acceleration in ms–2?

Solution: n = 2 revolution
v = 80 m/s from 3rd equation of motion = 40 m/s2

*Answer can only contain numeric values
QUESTION: 2

### In the motorcycle stunt called ‘the well of death’ the track is a vertical cylindrical surface of 18 m radius. Take the motorcycle to be a point mass and µ = 0.8. The minimum angular speed (rad/sec) of the motorcycle to prevent him from sliding down should be :

Solution:  From (1) and (2) *Answer can only contain numeric values
QUESTION: 3

### In the figure shown a lift goes downwards with a constant retardation. An observer in the lift observes a conical pendulum in the lift, revolving in a horizontal circle with time period 2 seconds. The distance between the centre of the circle and the point of suspension is 2.0 m. The retardation of the lift in m/s2 is : Solution:  geff = g + a
Put T = 2
⇒ a = 10 m/s2

*Answer can only contain numeric values
QUESTION: 4

A circular curve of a highway is designed for traffic moving at 72 km/h. If the radius of the curved path is 100 m, the correct angle (in degree) of banking of the road should be given by :

Solution: *Answer can only contain numeric values
QUESTION: 5

For a body in circular motion with a constant angular velocity, the magnitude of the average acceleration over a period of a half a revolution is how many times the magnitude of its instantaneous acceleration?

Solution: Instantaneous acceleration = ω2R *Answer can only contain numeric values
QUESTION: 6

A spot light S rotates in a horizontal plane with a constant angular velocity of 0.1 rad/s.  The spot of light P moves along the wall at a distance 3m.  What is the velocity in ms–1 of the spot  P when  θ = 45°? Solution:  *Answer can only contain numeric values
QUESTION: 7

A point P moves in counter clockwise direction on a circular path as shown in the figure. The movement of 'P'  is such that it sweeps out a length  s = t3 + 5, where  s is in metres and t  is in seconds. The radius of the path is 20 m. The acceleration in  ms–2 of 'P' when  t = 2s is nearly. Solution:

S = t3 + 5
Linear speed of the particle Linear acceleration at  t = 2s,     a1 = 12 m/s2

The centripetal acceleration  *Answer can only contain numeric values
QUESTION: 8

A stone is projected from level ground at  t = 0 sec such that its horizontal and vertical components of initial velocity are 10 m/s and 20 m/s respectively. Then the instant of time (in seconds) at which tangential and normal components are acceleration of stone are same is : (neglected air resistance) g = 10m/s2

Solution:

Tangential acceleration Normal acceleration  During upward motion

⇒  vy = vz
uy – gt = ux
20 – 10t = 10
t = 1 sec
During downward motion
at = an
vy – vx
20 – 10t = – 10
⇒ t = 3 sec

*Answer can only contain numeric values
QUESTION: 9

A ball suspended by a thread swings in a vertical plane so that its acceleration magnitudes in the extreme and lowest positions are equal. The thread deflection angle (in degree) in the extreme position is?

Solution:

Acceleration at lowest position From energy conservation acceleration at highest position according to problem aL = aH *Answer can only contain numeric values
QUESTION: 10

A bird is flying in air. To take a  turn  in the  horizontal  plane of radius R = 10m with  the velocity v = 10m/s at what angle (in degree) it should bend with the horizontal.

Solution:   