#22-Uniform-Circular-Motion
(Physics) > Laws of Motion
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Related Practice Questions :

In a uniform circular motion, which of the following quantity is not constant

(1) Angular momentum

(2) Speed

(3) Kinetic energy

(4) Momentum

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A cyclist turns around a curve at 15 miles/hour. If he turns at double the speed, the tendency to overturn is  

(1) Doubled

(2) Quadrupled

(3) Halved

(4) Unchanged

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If the overbridge is concave instead of being convex, the thrust on the road at the lowest position will be

(1) mg+mv2r

(2) mgmv2r

(3) m2v2gr

(4) v2gr

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A motor cyclist moving with a velocity of 72 km/hour on a flat road takes a turn on the road at a point where the radius of curvature of the road is 20 meters. The acceleration due to gravity is 10 m/sec2. In order to avoid skidding, he must not bend with respect to the vertical plane by an angle greater than 

(1) θ=tan16

(2) θ=tan12

(3) θ=tan125.92

(4) θ=tan14

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Two masses M and m are attached to a vertical axis by weightless threads of combined length l. They are set in rotational motion in a horizontal plane about this axis with constant angular velocity ω. If the tensions in the threads are the same during motion, the distance of M from the axis is 

(1) MlM+m

(2) mlM+m

(3) M+mMl

(4) M+mml

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