a body moves in a circular road of radius 42m and it complete half circle in time 1 minutes find its speed and velocity
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ANSWER :
Given :
▪ Radius of circular path = 42m
▪ No. of revolutions = 1/2
▪ Time interval = 1min
To Find :
1) speed
2) velocity
Concept :
✏ Speed is defined as the ratio of distance covered to the time taken.
✏ Velocity is defined as the ratio of displacement to the time taken.
✏ Speed is a scalar quantity whereas velocity is a vector quantiy.
✏ Actual length of path is called as distance.
✏ The shortest distance b/w initial and final position is called as displacement.
Calculation :
☞ Speed = distance/time
☞ Speed = πR/t
☞ Speed = 22×42/7×60
☞ Speed = 4.2mps
→ Velocity = displacement/time
→ Velocity = 2R/t
→ Velocity = 2×42/60
→ Velocity = 1.4mps
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