Circular Motion
Physics ⇒ Mechanics
Circular Motion starts at 10 and continues till grade 12.
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See sample questions for grade 10
A satellite orbits the Earth in a circular path. What provides the centripetal force for its motion?
A stone is tied to a string and whirled in a vertical circle. At the top of the circle, what are the forces acting on the stone?
Describe what happens to the centripetal force if the speed of an object in circular motion is doubled, keeping the radius constant.
Explain why an object moving in a circle at constant speed is said to be accelerating.
A 0.2 kg object is attached to a string and moves in a circle of radius 0.4 m at 2 m/s. What is the centripetal acceleration?
A 0.5 kg ball is attached to a string and swung in a horizontal circle of radius 1.5 m at a speed of 3 m/s. Calculate the tension in the string.
A 1 kg mass is moving in a circle of radius 2 m with an angular velocity of 3 rad/s. What is its linear speed?
A 2 kg object moves in a circle of radius 0.5 m at a speed of 6 m/s. What is the magnitude of the centripetal force?
Which of the following best describes the direction of the centripetal force?
(1) Outward from the center
(2) Tangent to the circle
(3) Perpendicular to the plane of the circle
(4) Toward the center of the circle
Which of the following best explains why satellites do not fall to Earth?
(1) They are beyond Earth's gravity
(2) They have no mass
(3) Their centripetal force is provided by gravity, matching their orbital speed
(4) They are pushed by solar wind
Which of the following is NOT a characteristic of uniform circular motion?
(1) Constant speed
(2) Constant direction of velocity
(3) Constant magnitude of velocity
(4) Constant radius
Which of the following is NOT an example of circular motion?
(1) The Earth revolving around the Sun
(2) A car turning around a roundabout
(3) A ball dropped from a height
(4) A ceiling fan rotating
The acceleration of an object moving in a circle at constant speed is called __________ acceleration.
The direction of centripetal acceleration is always __________ to the velocity of the object in circular motion.
The force that keeps an object moving in a circle is called __________ force.
The frequency of revolution is the number of __________ completed per second.
True or False: In non-uniform circular motion, the speed of the object changes.
True or False: In uniform circular motion, the speed of the object remains constant but its velocity changes.
True or False: The centripetal force is a new kind of force that exists only in circular motion.
True or False: The direction of angular velocity is perpendicular to the plane of rotation.
