Circular Motion
Physics ⇒ Mechanics
Circular Motion starts at 10 and continues till grade 12.
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See sample questions for grade 11
A 0.5 kg mass is attached to a string and moves in a circle of radius 0.8 m at 3 m/s. Calculate the tension in the string.
A 1.5 kg object moves in a circle of radius 2 m at a constant angular velocity of 5 rad/s. What is the centripetal force acting on it?
A 2 kg object moves in a circle of radius 0.5 m with a speed of 6 m/s. What is its centripetal acceleration?
A ball completes 10 revolutions in 5 seconds. What is its frequency of revolution?
A car of mass 1000 kg moves at a constant speed of 20 m/s around a circular track of radius 50 m. Calculate the magnitude of the centripetal force acting on the car.
A mass of 0.2 kg is swung in a horizontal circle of radius 1.5 m at a constant speed of 3 m/s. Calculate the period of revolution.
A satellite orbits Earth in a circular path. What provides the centripetal force in this case?
A stone is tied to a string and whirled in a horizontal circle of radius 2 m at a speed of 4 m/s. What is its angular velocity?
A wheel rotates at 120 revolutions per minute (rpm). What is its angular velocity in radians per second?
Describe the difference between centripetal and centrifugal forces.
Explain why passengers feel pushed outward when a car takes a sharp turn.
If the angular velocity of a particle is doubled, what happens to its centripetal acceleration (assuming radius is constant)?
If the radius of a circle is doubled while keeping the speed constant, what happens to the centripetal acceleration?
State the formula for centripetal acceleration in terms of speed v and radius r.
State the SI unit of angular displacement.
Which force provides the centripetal force for a car turning on a flat road?
A 0.4 kg mass is moving in a horizontal circle of radius 0.7 m on a frictionless table, attached to a string passing through a hole in the center. If the mass moves at 2 m/s, what is the force exerted by the string on the mass?
A 0.5 kg ball is attached to a 1.2 m long string and is swung in a vertical circle. If the speed of the ball at the top of the circle is 4 m/s, what is the tension in the string at the top? (Take g = 9.8 m/s2.)
A 1.2 kg object is attached to a string and moves in a horizontal circle of radius 0.5 m. If the maximum tension the string can withstand is 30 N, what is the maximum speed at which the object can move without breaking the string?
A 2 kg object is attached to a 1.5 m long string and is whirled in a vertical circle. What is the minimum speed at the top of the circle so that the string remains taut? (Take g = 9.8 m/s2.)
