Question

3.A body goes from A to B with a speed of 60 km/h and returns to the starting point with a speed of 40 km/h.His average speed and average velocity respectively are

Answer 1

Answer:

your answer is -

Explanation:

Speed from A to B = 60 Km/h

Let distance be D

Time taken to travel from A to B = distance/speed = D/60 h

TIME TAKEN TO TRAVEL FROM B TO A = D/40

TOTAL TIME = D/60 + D/40 = 5D/120

TOTAL DISTANCE = D + D = 2D

Average speed = Total distance/ total time = 2D/5D BY 120 = 28 KM/H

DISPLACEMENT = 0 m

AVERAGE VELOCITY = INITIAL VELOCITY + FINAL VELOCITY/2 = 60 + 40 / 2 = 50 KM/H