Here you can find solved numerical problems on Rotatory and Circular Motion included in the new course of Physics, Grade 11.

S.No Description of the Question
Problem 1 If the plate microwave oven has a radius of 0.15 m and rotates at 6.0 rev/min, calculate the total distance traveled by the fly during a 2.0 minutes cooking period.
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Problem 2 A circular drum of radius 40 cm is initially rotating at 400 rev/min. It is brought to stop after making 50 revolutions. What is the angular acceleration and the stopping time?
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Problem 3 A string 1 m long is used to whirl a 100 grams stone in a horizontal circle at a speed of 2 m/s. Find the tension in the string.
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Problem 4 The moon revolves around the earth in almost a circle of radius 382400 Km in 27.3 days. What is the centripetal acceleration?
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Problem 5 A modern F1 car can accelerate from 0 to 62 miles/h (100 km/h) in 2.50 s. What is the angular acceleration of its 170 mm radius wheel?
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Problem 6 An electric motor is running at 1800 rev/min. It comes to rest in 20 s. If the angular acceleration is uniform find the number of revolutions made before stopping.
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Problem 7 What is the moment of inertia of a 100 kg sphere whose radius is 50 cm.
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Problem 8 A rope is wrapped several times a cylinder of radius 0.2 m and mass 30 kg. What is the angular acceleration of the cylinder if the tension in the rope is 40 N and it turns without friction?
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Problem 9 What is the K.E of a 5 kg solid ball whose diameter is 15 cm if it rolls across a level surface with a speed of 2 m/s?
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Problem 10 A cylinder of 50 cm diameter at the top of an incline 29.4 cm high and 10 m long is released and rolls down the incline. Find the linear and angular speed at the bottom. Neglect friction.
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Problem 11 A disc without slipping rolls down a hill of vertical height 1000 cm. If the disc starts from rest at the top of the hill, what is its magnitude of velocity at the bottom?
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Problem 12 A motor car is traveling at a speed of 30 m/s. If its wheel has a diameter of 1.5 m, find its angular speed in rad/s and rev/s.
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