Uniform Circular Motion RT

When an object moves with uniform speed in a circular orbit, its centripetal acceleration must be directed

• Away from the centre of circle

• Perpendicular to the centre of circle

• Towards the centre of circle

• Along the direction of motion

The acceleration of a body undergoing uniform circular motion is constant in

• Both direction and magnitude

• Neither direction nor magnitude

• Direction only

• Magnitude only

When a stone is whirled in a vertical circle at the end of a string, the tension in the string is maximum

• At the top

• At the bottom

• At the horizontal diameter

• At the centre

A car of mass 1 kg moves round a curve whose radius of curvature is 100 m at a speed 10 ms^-1. What is the centripetal force on the car

• 1 N

• 0.1 N

• 10 N

• 100 N

For a particle moving in uniform circular motion

• Velocity is transverse and acceleration is radial

• Velocity is radial and acceleration is transverse

• Both velocity and acceleration are transverse

• Both velocity and acceleration are radial

A wheel is 1 m in diameter. When it makes 30 rev. per minute, the linear speed of a point in m/sec on its circumference is

• p

The angular speed of hour's hand of mechanical watch is --------- radian per hour

If a wheel of radius ‘r’ turns through an angle of 30^o, then the distance through which any point on this rim moves

When a stone is whirled in a horizontal circle by means of a string, the centripetal force is supplied by

• Tension in the string

• Mass of the stone

• Velocity of the stone

• Air Friction

When a body moves in a circle, the angle between its linear velocity v and the angular velocity ω is

• 90⁰

• 0⁰

• 45⁰

• 180⁰