Question

A particle is accelerated uniformly from rest, so that after 10 seconds it has achieved a speed of
15 m s-1
. Find its acceleration and the distance it has covered?

Answer 1

Answer:

A particle is accelerated uniformly from rest, so that after 10 seconds it has achieved a speed of

15 m s-1

. Find its acceleration and the distance it has covered?

Answer 2

Explanation:

V=at

⇒8=a10

⇒a=0.8m/s

2

V

2

=U

2

+2as

⇒U=8

2

+2×a64

⇒a=

2×64

−64

=−0.5m/s

2

Distance travelled= Area of graph

⇒584=

2

1

×10×8+8×t

1

+

2

1

×16×8

⇒584=40+8t

1

+64

⇒8t

1

=480

⇒t

1

=60

Total time= 10+60+16=86s

solution