- Home
- General Science
Physics -- Circular, Rotational and Simple Harmonic Motions
6.
A body moves along an uneven horizontal road surface with constant speed at all points. The normal reaction of the road on the body is
- A.maximum at A
- B.maximum at B
- C.minimum at C
- D.the same at A, B and C
- Answer
- Report
Answer : [A]
7.
In gravity-free space, a particle is in contact with the inner surface of a hollow vertical cylinder and moves in a horizontal
circular path along the surface. There is some friction between the particle and the surface. The retardation of the particle is
- A.zero
- B.independent of its velocity
- C.proportional to its velocity
- D.proportional to the square of its velocity
- Answer
- Report
Answer : [D]
8.
For a car taking a turn on a horizontal surface, let N1 and N2 be the normal reactions of the road on the inner and outer wheels respectively.
- A.N1 is always greater than N2
- B.N2 is always greater than N1
- C.N1 is always equal to N2.
- D.Either (a) or (b) depending on the speed of the car and the radius of curvature of the road.
- Answer
- Report
Answer : [B]
9.
curved section of a road is banked for a speed v. If there is no friction between the road and the tyres then
- A.a car moving with speed v will not slip on the road
- B.a car is more likely to slip on the road at speeds higher than v, than at speeds lower thanv
- C.a car is more likely to slip on the road at speeds lower than v, than at speeds higher than v
- D.a car can remain stationary on the road without slipping
- Answer
- Report
Answer : [A]
10.
A cyclist moves along a curved road with a velocity v. The road is banked for speed v. The angle of banking is θ. Which of the following statements is not true?
- A.The cyclist will lean away from the vertical at an angle θ.
- B.The normal reaction of the road will pass through the centre of gravity of the ‘cycle plus cyclist’ system.
- C.There will be no force of friction between the tyres and the road.
- D.The cyclist is in equilibrium with respect to the ground
- Answer
- Report
Answer : [D]
|
|
||||||||||||||||||||||||||||
