Question

2. A car is moving along a straight line OP as
shown below. It moves from O to Pin 18 S
and returns from P to Q in 6 s. What are the
average velocity and average speed of the
car in going
(a) from O to P
(b) from O to P and back to Q
o
Q
P
Om
120 m
240 m
360 m​

Answer 1

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