Question

if the time taken to go from A to b is 8 seconds and from b to c is 2s calculate the average speed and velocity between a and c . consider unit of distance in meter

Answer 1

Answer:

Correct option is

C

15 m s

−1

Position is given as x=a+bt

2

=8.5+2.5t

2

Position at t=2 s, x

2

=8.5+2.5(2)

2

=18.5 m

Position at t=4 s, x

1

=8.5+2.5(4)

2

=48.5 m

Displacement S=x

2

−x

1

=48.5−18.5=30 m

Time taken t=4−2=2 s

Average velocity V

avg

=

t

S

=

2

30

=15 m/s