Advertisements
Advertisements
Question
A uniform circular motion is an accelerated motion. Explain it. State whether the acceleration is uniform or variable? Name the force responsible to cause this acceleration. What is the direction of force at any instant? Draw a diagram in support of your answer.
Solution
When the object moves in a circular path with uniform speed, it means that its magnitude of velocity does not change, only its direction changes continuously. Hence, it is considered as uniformly accelerated motion.
In a uniform circular motion, the acceleration is variable.
An object in uniform circular motion experiences an inward net force. This force is called centripetal force.
The centripetal force is directed towards the center of the circular path.
Direction of force in uniform circular motion
APPEARS IN
RELATED QUESTIONS
Explain the meaning of uniform circular motion. Give one example of such motion.
Answer the following question.
What is a conical pendulum?
Which one of the following is most likely not a case of uniform circular motion?
A particle performs uniform circular motion in a horizontal plane. The radius of the circle is 8 cm. The centripetal force acting on the particle is 15 N. Its kinetic energy is ____________.
Select the WRONG statement.
The angular speed of the minute hand of a clock in degrees per second is ______.
Which of the following is correct about uniform circular motion
- the direction of motion is continuously changed
- the direction of motion is not changed
- speed and direction both remain constant
- speed is constant but the direction is changing
A body is said to be in nonuniform motion if it travels ______.
A body moving along a circular path of radius R with velocity v, has centripetal acceleration a. If its velocity is made equal to 2v. What will be the centripetal acceleration?
A ceiling fan rotates about its own axis with some angular velocity. When the fan is switched off the angular velocity becomes `(1/4)^"th"` of the original in time 't' and 'n' revolutions are made in that time. The number of revolutions made by the fan during the time interval between switch off and rest are ______. (Angular retardation is uniform)
