Quiz for Circular motion

Q1: What provides the necessary centripetal force for a car turning on a flat road?

A. Gravitational force B. Normal reaction C. Frictional force D. Tension

Q2: In uniform circular motion, the acceleration of the object is directed:

A. Tangential to the circle B. Toward the center of the circle C. Away from the center D. In the direction of motion

Q3: A stone is tied to a string and whirled in a horizontal circle. The tension in the string provides:

A. Centrifugal force B. Gravitational force C. Centripetal force D. Tangential velocity

Q4: Centrifugal force is:

A. A real force B. A fictitious force C. An electrostatic force D. A gravitational force

Q5: The unit of centripetal force is:

A. kg B. N C. m/s D. Joule

Q6: An object moving in a circle with constant speed has:

A. Zero acceleration B. Changing speed C. Changing velocity D. Constant velocity

Q7: The angular velocity is measured in:

A. m/s² B. rad/s C. rad D. m/s

Q8: For an object in circular motion, the radial acceleration is given by:

A. v²/r B. r²/v C. v/r² D. r/v²

Q9: Which of the following quantities is not constant in uniform circular motion?

A. Speed B. Magnitude of velocity C. Direction of velocity D. Centripetal force

Q10: Banking of roads helps in:

A. Increasing the speed B. Reducing friction C. Providing centripetal force D. Reducing normal force

Q11: The angle of banking depends on:

A. Speed of the vehicle B. Radius of the curve C. Both speed and radius D. None of the above

Q12: Centripetal force always acts:

A. Along the tangent B. Toward the center C. Outward from center D. Opposite to motion

Q13: In vertical circular motion, tension is maximum at:

A. Topmost point B. Bottommost point C. Midpoint D. Same throughout

Q14: The minimum speed for a body to complete a vertical circle is:

A. √(g/r) B. 2√(gr) C. √(5gr) D. √(2gr)

Q15: The expression mv²/r gives:

A. Kinetic energy B. Centrifugal force C. Centripetal force D. Work done

Q16: A cyclist bends while turning to:

A. Reduce friction B. Increase normal force C. Balance centripetal force D. Reduce speed

Q17: In non-uniform circular motion, there is:

A. Only radial acceleration B. Only tangential acceleration C. Both radial and tangential acceleration D. No acceleration

Q18: When a stone is tied to a string and whirled horizontally, the string breaks. The stone moves:

A. Toward center B. In circular path C. Tangentially D. Falls down

Q19: Which of the following is required for circular motion?

A. Linear acceleration B. Radial acceleration C. Gravitational force D. Potential energy

Q20: Work done by centripetal force is:

A. Positive B. Negative C. Zero D. Variable