Question

an object complete one round of circular track of radius 50m in 30sec .what is the speed also calculate the distance and displacement of object after 1min 15sec​

Answer 1

Answer:

Distance covered by the object = 314 m

Speed of the object = 10.46 m/s

Displacement = 156.5 m

Explanation:

r (radius) = 50 m

Circumference of the track (distance covered) = 2 π r

D (distance) = 2 x 3.14 x 50 = 314 m

t (time) = 30 s

Speed = Distance /Time

           = 314 /30 = 10.46 m/s

Displacement of object after 1 min 15 secs

t = 60 + 15 = 75 s

speed = 10.46

Distance covered by object in 1 min 15 s = speed x time

                        = 10.46 x 75 = 784.5 m

Distance covered by object in 2 rounds = 314 x 2 =628 m

Displacement = 784.5 - 628 = 156.5 m