Question

Please yar 5 question.

Answer 1

displacement in 10 seconds

= 1/2 ( 5)( 10^2)

= 250

V= 5(10) = 50

Now decelerates

V= u +at

0 = 50 + 5 a

a=-10

Displacement in 5 seconds when decelerates

= 50 (5) - 1/2 ( 10) (5)^2

= 250 - 125= 125

average speed = 250 + 125)/ 15

= 375/15 = 25 m/s