Question

A car is moving along a straight line.It moves through 300m from O to P along the positive direction of y axis in 20s and then back from P to Q through a distance of 120 metre in 8 seconds.
What are the 1)average velocity
2) average speed of the car going from a)O to P
b) from O to P and back to Q

Answer 1

Answer:

ANSWER

$$(a)$$

Displacement from O to P=360m

Time taken from O to P=18sec

Velocity of car =

Time

Displacement

=

18

360m

Avg. Velocity of car (O to P)=20ms

−1

Time taken from P to Q=6sec

Total time taken to move from O to P and back at Q,

T

′

=16+6=24

Displacement from P to Q=240m

Average speed of car from P to Q=

24sec

240m

=10ms

−1