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- 1. Multiple Choice
A cyclist while negotiating a circular path with speed 20 m s-1 is found to bend an angle by 30o with vertical. What is the radius of the circular path?
(given, g = 10 m s-2)
69.3 m
58.2 m
74.6 m
95.4 m
- 2. Multiple Choice
A body of weight W is resting on a frictional surface. The angle between the force of friction and the normal reaction is:
00
300
900
1800
- 3. Multiple Choice
A cyclist is moving with a velocity v turns a circular path of radius r. His inclination with the vertical is given by:
tan θ = v2 / rg
tan θ = v2g / r
tan θ = v2rg
none of the above
- 4. Multiple Choice
A cyclist going round in a circular track at a constant speed has:
constant linear velocity
constant linear velocity
acceleration constant magnitude with its direction changing
None of these
- 5. Multiple Choice
A body of mass m slides down a rough inclined plane of angle θ. The acceleration of the body at any instant is:
g
g sinθ
g (sin θ + μk cos θ)
g (sin θ - μk cos θ)
- 6. Multiple Choice
The body will move only when:
Force of friction = applied force
Force of friction < applied force
Force of friction > applied force
All of the above
- 7. Multiple Choice
A body slipping on a rough horizontal plane moves with a deceleration of 4.0 m/s2. What is the coefficient of kinetic friction between the block and the plane? (g= 10 ms-2)
0.5
0.2
0.6
0.4
- 8. Multiple Choice
When a body is moving on a surface, the force of friction is called:
Static friction
Dynamic friction
Limiting friction
Rolling friction
- 9. Multiple Choice
If μs, μk and μr are coefficients of static friction, sliding friction and rolling friction, then
μs < μk < μr
μk < μr < μs
μr < μk < μs
μr = μk = μs
- 10. Multiple Choice
A box is placed on an inclined plane and has to be pushed down. The angle of inclination is:
Equal to angle of friction
More than angle of friction
Equal to angle of repose
Less than angle of repose
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