Circular Motion
Physics ⇒ Mechanics
Circular Motion starts at 10 and continues till grade 12.
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See sample questions for grade 12
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.
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 particle moves in a circle of radius 0.25 m with a frequency of 10 Hz. What is its angular velocity?
A particle moves in a circle of radius 10 cm with a constant speed of 2 m/s. Find its frequency of revolution.
A satellite orbits Earth in a circular path of radius 7000 km. If its speed is 7.5 km/s, calculate its period of revolution.
A stone tied to a string is whirled in a horizontal circle of radius 2 m at a speed of 4 m/s. What is the tension in the string if the mass of the stone is 0.5 kg?
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.
State the formula for centripetal acceleration in terms of speed v and radius r.
