Question

100 POINT QUESTION a body is travelling with a speed of 72 km per hour in 10 minutes and come to stop find its acceleration​

Answer 1

Answer:

given that

initial velocity. = 72 km/hr

change into m/s

velocity= 72×5/18 m/s

= 20 m/s

now ,

time= 10 minutes= 600 seconds

v= u+at

0= 20+ a× 600

a= 20/600

a= 1/30 m/s^2

Answer 2

Given :-

• Speed = 72 km/h
• Time (n) = 10 minutes.

To find :-

• Acceleration = ?

Solution :-

Here, initial velocity (u) = 72 km/h

→ u = (72 × 1000)/(3600)

→ u = 72000/3600

→ u = 20 m/s

And, it will stop after 10 minutes, so it's final velocity (v) = 0

Time (t) = 10 minutes.

→ t = (10 × 60) seconds.

→ t = 600 seconds.

Here, we know equation :-

→ v = u + at

Putting all values:-

→ 0 = 20 + 600a

→ 600a = -20

→ a = -20/600

→ a = -(1/30) m/s²

Therefore,

Acceleration of body = -(1/30)m/s²