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QUIZ 2:circular Motion(#free Test Series)


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15 Questions MCQ Test | QUIZ 2:circular Motion(#free Test Series)

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QUIZ 2:circular Motion(#free Test Series) - Question 1

A man whirls a stone of mass 250 gram, tied at the end of a string of length 2 m in a horizontal circle and at a height of 5 m from the ground. The string breaks and the stone flies off tangenitially and strikes the ground at a horizontal distance of 10 m from the man. What was the magnitude of the centripetal acceleration of the stone, when it was moving in the circle? (g = 10 m/s2)

QUIZ 2:circular Motion(#free Test Series) - Question 2

A mass of 5 kg is tied to a string of length 1.0 m and is rotated in vertical circle with a uniform speed of 4 m/s. The tension in the string will be 130 N when the mass is at (g = 10 m/s2)

QUIZ 2:circular Motion(#free Test Series) - Question 3

A mass suspended on a frictional less horizontal surface. It is attached to a string and rotates about a fixed centre at an angular velocity w0. If length of the string and angular velocity are doubled the tension in the string which was initially T0 is now

QUIZ 2:circular Motion(#free Test Series) - Question 4

A metal sphere of mass 0.1 kg is attached to an inextensible string of length 130 cm whose upper end is fixed to the rigid support. If the sphere is made to describe a horizontal circle of radius 50 cm, the time for its one revolution is nearabout

QUIZ 2:circular Motion(#free Test Series) - Question 5

A motor cyclist loops a vertical circular loop of diameter 18 m, without dropping down, even at the highest point of the loop. What should be his minimum speed at the lowest point of the loop?

QUIZ 2:circular Motion(#free Test Series) - Question 6

A motor cyclist moving with a velocity of 75 km/hr on a flat road takes a turn on the road at a point where the radius of curvature of the road is 20 m. If the g is 10 m/s2 the maximum angle of banking with vertical for no skidding is

QUIZ 2:circular Motion(#free Test Series) - Question 7

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion takes place in a plane. It follows that

QUIZ 2:circular Motion(#free Test Series) - Question 8

A particle of mass m is moving in a horizontal circle of radius R with uniform speed v. When it moves from one point to a diametrically opposite point its

Detailed Solution for QUIZ 2:circular Motion(#free Test Series) - Question 8

On the diametrically opposite points, the velocities have same magnitude but opposite directions. Therefore change in momentum is
Mv - (-Mv) = 2Mv

QUIZ 2:circular Motion(#free Test Series) - Question 9

A particle is performing a U.C.M. Which is the wrong statement regarding its motion?

QUIZ 2:circular Motion(#free Test Series) - Question 10

A particle moving in a circle of radius 25 cm at 2 revolutions per second. The acceleration of the particle is S.I. unit is

QUIZ 2:circular Motion(#free Test Series) - Question 11

A particle revolves round a circular path. The acceleration of the particle is

QUIZ 2:circular Motion(#free Test Series) - Question 12

A pulley one metre in diameter rotating at 600 r.p.m. is brought to rest in 80 sec. by a constant force of friction on its shaft. How many revolutions does it makes before coming to rest?

QUIZ 2:circular Motion(#free Test Series) - Question 13

A small body attached at the end of an inextensible string completes a vertical circle, then its

QUIZ 2:circular Motion(#free Test Series) - Question 14

A stone attached to a rope of length l = 80 cm is rotated with a speed of 240 r.p.m. At the moment when the velocity is directed vertically upwards, the rope breaks. To what height does the stone rise further?

QUIZ 2:circular Motion(#free Test Series) - Question 15

A stone of mass 250 gram, attached at the end of a string of length 1.25 m is whirled in a horizontal circle at a speed of 5 m/s. What is the tension in the string?

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