Uniform circular motion is the motion of an object in a circle with a ________________ but the direction of the velocity is continually changing with time.
A.uniform acceleration
B.constant speed
C.constant velocity
D.constant acceleration
What is the relation between r, s and θ?
A.s=rθ
B.s = r/θ
C.r = sθ
D.θ = rs
The time taken for one complete circuit is called the _____________.
A.angular velocity
B.time
C.frequency
D.period
Angular velocity, ω defined as the rate of change of _________.
A.angular distance
B.uniform speed
C.angular displacement
Which of the following vector represents the velocity of the ball?
Centripetal acceleration always points ____.
A.in the direction of the object's motion
B.in the opposite direction of the object's motion
C.towards the center of the circle
D.towards the outside of the circle
Which of the following statements is FALSE for a stone attached to a string and swung in a uniform vertical circular motion?
A.The magnitude of resultant force acting on the stone changes depending on the position of the stone in the circle.
B.The tension in the string is lowest when the stone is at the highest point of the circular motion.
C.The kinetic energy of the stone is constant throughout the entire circular motion.
D.The resultant acceleration is always directed towards the centre of the circle.
Where is the net force when the rollercoaster is at the top of the loop?
A.Towards the sky
B.Towards the right
C.Towards the left
D.Towards the ground
________________________ defined as the number of revolutions (cycles/rotations) completed in one second.
A.Centripetal acceleration
B.Frequency
C.Period
D.Angular velocity
A rock is attached to a string swings in a vertical circle. At the highest point,
A.no forces acting on the rock
B.only one force acts on the rock
C.two forces act on the rock and their resultant is zero.
D.two forces act on the rock and their resultant is not zero.