Solve this:
When a body is a body said to undergo uniform acceleration? A bus decreases its speed from 72 km/hr to 54 km/hr in 2 hours.Calculate the acceleration.

Open in App

Solution

Dear Student ,
$I f a b o d y t r a v e l s i n a s t r a i g h t l i n e a n d i t s v e l o c i t y c h a n g e s b y e q u a l a m o u n t s i n e q u a l i n t e r v a l s o f t i m e, h o w e v e r s m a l l t h e s e t i m e i n t e r v a l s m a y b e, t h e n t h e b o d y i s s a i d t o b e i n u n i f o r m a c c e l e r a t i o n .$
?given, u=72km/hr
v=54km/hr
t=2hr
we know that, v=u+at
so, a=v-u/t
then, a=54-72/2
a=-10km/hr*hr
here negative sign indicates retardation .
Regards

Suggest Corrections

Similar questions

Q. A car accelerates from 18 km/hr to 36 km/hr in 10 sec. Calculate its acceleration.

A bus decreases its speed from 80 km/hr to 60 km/hr in 5 s. Find the acceleration of the bus.

A bus accelerates uniformly 54 km/h to 72 km/h in 10 sec calculate acceleration in m/s²and distance covered by the bus in meters during this interval.

Q. A bus decreases its speed from

80 k m / h r

60 k m / h r

on a straight road in

5 s e c

. Find the magnitude of acceleration of the bus.

A bus decreases its speed from $80 k m h r^{- 1}$ to $60 k m h r^{- 1}$ in 5 seconds. What is the acceleration of the bus?

Join BYJU'S Learning Program

Solve this: When a body is a body said to undergo uniform acceleration? A bus decreases its speed from 72 km/hr to 54 km/hr in 2 hours.Calculate the acceleration.

Solve this:
When a body is a body said to undergo uniform acceleration? A bus decreases its speed from 72 km/hr to 54 km/hr in 2 hours.Calculate the acceleration.