(A) Maximum
(B) Minimum
(C) zero
(D) positive
Tag: Physics Mcq
Two cars of masses m1 and m2 are moving along the circular path of radius r1 and r2. They take one round in the same time. The ratio of angular velocity of the two cars will be?
(A) m1:m2
(B) 1:1
(C) r1:r2
(D) m1:m2: m2:r2
Two bodies of equal masses are moving on two circular paths of radii in ratio 1:2 with same angular velocity. The ratio of centripetal forces acting on those bodies is?
(A) 1:2
(B) 1:4
(C) 2:1
(D) 4:1
A wheel rotates with a constant acceleration of 2 rad/s2. If the wheel starts from rest, the number of revolution it makes in first ten seconds will be approximately?
(A) 8
(B) 24
(C) 16
(D) 32
When a body moves in a circle, the angle between its linear acceleration ‘a’ and angular acceleration ‘α’ is always.
(A) 180°
(B) 90°
(C) 0°
(D) 45°
A body is rotating clockwise with decreasing angular velocity. Its angular acceleration is directed?
(A) Into the plane of paper
(B) Out of the plane of paper
(C) Along the radius
(D) along the tangent to the circle
1 degree is equal to _______ radians.
(A) π/180
(B) 180/π
(C) 2π/180
(D) 1/57.3
1000 N force is required to lift a hook and 10000 N force is requires to lift a load slowly. Find power required to lift hook with load with speed v=0.5m/sec?
(A) 5kw
(B) 5.5kw
(C) 1.5kw
(D) 4.5kw