Question

A body travels along a circular path of radius 50m. After travelling half a
revolution in 30s. Find it's average velocity and speed.​

Answer 1

Answer:

Explanation: circumference of a circle is 2$\pi$r.

here , we got the radius=50m

so, circumference=2×22/7×50

which is 314.28.

ATQ, he travelled half the distance so the distance he travelled is 314.28/2

                                                                                                            =157.14

the time taken is 30 s

so, speed =distance/time,  

                 =157.14/30            

            i.e   5.23 m/s.

and, the average velocity is displacement/time in which displacement = diameter of the path i.e 100m and the time is 30s

av. velocity =100/30 = 3.33m/s

hope this helped

Answer 2

Answer:

Answer:

Explanation: circumference of a circle is 2\piπ r.

here , we got the radius=50m

so, circumference=2×22/7×50

which is 314.28.

ATQ, he travelled half the distance so the distance he travelled is 314.28/2

                                                                                                            =157.14

the time taken is 30 s

so, speed =distance/time,  

                 =157.14/30            

            i.e   5.23 m/s.

and, the average velocity is displacement/time in which displacement = diameter of the path i.e 100m and the time is 30s

av. velocity =100/30 = 3.33m/s

hope this helped