Question

a jogger moves 500m in 2 mins and next 1000m in 30 seconds on the same straight path?what is his average speed and velocity?

Answer 1

Explanation:

v(ave) = (Vf + Vo)/2

To get initial velocity (Vo):

Vo = d/t

Vo = 500m/2 mins

Vo = 250 m/mins × 1 min/60 sec

Vo = 25/6 m/sec

To get final velocity (Vf):

Vf = d/t

Vf = 1000 m/30 sec

Vf = 100/3 m/sec

v(ave) = (Vf + Vo)/2

v(ave) = (100/3 m/sec + 25/6 m/sec)/2

v(ave) = (75/2 m/sec)/2

v(ave) = 75/4 m/sec or 18.75 m/sec ANSWER