Question

what is meant by uniform circular motion? A car goes around a circular track ones every 5 min .If the radius of the circular track is 350m calculate it speed .(Given:π=22/7)​

Answer 1

Answer - 1)

☯️ Uniform circular motion.

When a particle moves along a circular path, its motion is known as circular motion. It is always Non-uniform motion because velocity changes continuously due to change in direction.

Uniform Circular motion is the motion of a particle along the circular path with uniform speed. But it is accelerated because velocity changes. The acceleration is towards the centre, and is known as centrpetal acceleration.

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✤ Answer 2)

✒ GiveN:

• Radius of the track = 350 m
• Time taken = 5 min
• Considered π = 22/7

✒ To FinD:

• Speed of body....?

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✤ How to solve?

We already know about something about Circular motion. To find the speed, We need to find distance travelled and time taken, Because

$\large{ \boxed{ \sf{Speed = \dfrac{Distance}{Time} }}}$

Here,

• Distance = Circumference of ○
• Time taken = Given ATQ,

So, let's find the answer using formula....

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✤ Solution:

We have,

• Radius = 350 m

➙ Circumference of ○ = 2πr

➙ Circumference of ○ = 2 × 22/7 × 350 m

➙ Circumference of ○ = 2200 m

So, Distance travelled by the body = 2200 m

• Time taken = 5 mins = 5 × 60 s

So, By using formula,

➙ Speed = Distance/Time

➙ Speed = 2200/300 m/s

➙ Speed = 7.334 m/s

✒ Speed of the body = 7.334 m/s

☀️ Hence, solved !!

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Answer 2

Answer:

When a particle moves along a circular path, its direction changes every moment. The speed of the.particles may change or remain constant. If the speed of the particle moving in a circle is same, it is.said to be in uniform circular motion. Since the direction of the particle is changing every moment, its velocity is continuously changing. Thus, the motion of the body along circular path is an example of accelerated motion. This acceleration acts towards the centre of the circle and hence, called centripetal or radial acceleration.