Circular Motion
Physics ⇒ Mechanics
Circular Motion starts at 10 and continues till grade 12.
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See sample questions for grade 12
Describe the difference between uniform and non-uniform circular motion.
Explain why an object moving in a circle at constant speed is said to be accelerating.
Explain why passengers feel pushed outward when a car turns sharply, even though the actual force acts towards the center.
State the direction of velocity and acceleration vectors for a particle in uniform circular motion at any instant.
A 0.1 kg mass is attached to a string and whirled in a vertical circle of radius 0.4 m. What is the minimum speed at the top of the circle to keep the string taut? (Take g = 9.8 m/s²)
A 0.2 kg ball is attached to a 0.5 m string and swung in a horizontal circle at 3 m/s. What is the angular velocity of the ball?
A 2 kg object is moving in a circle of radius 0.5 m at an angular speed of 4 rad/s. Calculate the centripetal force.
A 500 g mass is swung in a horizontal circle of radius 1.2 m at a speed of 6 m/s. Calculate the required centripetal force.
If the angular velocity of a particle is doubled, what happens to its centripetal acceleration (assuming radius remains constant)? (1) It doubles (2) It quadruples (3) It halves (4) It remains the same
If the radius of a circle is doubled while keeping the speed constant, what happens to the centripetal acceleration? (1) It doubles (2) It halves (3) It becomes four times (4) It becomes one-fourth
Which of the following best describes angular velocity? (1) Rate of change of linear displacement (2) Rate of change of angular displacement (3) Rate of change of speed (4) Rate of change of centripetal force
Which of the following is NOT a necessary condition for uniform circular motion? (1) Constant speed (2) Constant velocity (3) Constant radius (4) Constant magnitude of centripetal force
The acceleration directed towards the center of a circle in circular motion is called __________ acceleration.
The angular displacement covered in one complete revolution is __________ radians.
The direction of the centripetal force is always __________ to the path of the object in circular motion.
The linear velocity v of a particle in circular motion is related to its angular velocity ω and radius r by the equation v = __________.
True or False: In non-uniform circular motion, the speed of the object changes but the direction of motion remains constant.
True or False: The centripetal force always acts perpendicular to the velocity of the object in circular motion.
True or False: The net force acting on an object in uniform circular motion is zero.
True or False: The work done by the centripetal force in uniform circular motion over one complete revolution is zero.
