Book Online Demo

Check Your IQ

Try Test

Courses

Offline Centres

A bus decreases its speed from $80 km / h$ to $60 km / h$ in $5 \sec$ . Then the acceleration of the bus is

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

- 144000 km / h²

1.1 km / h²

- 1.1 km / h²

144000 km / h²

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

The acceleration of the bus is

- 144000 km / h²

.
Initial speed,

u = 80 km / h

Final speed,

v = 60 km / h

Time

= 5 \sec = 5 / 3600 h

From the equation of motion
We know that,

v = u + at

........................equation (1)
Putting all the values in equation (1),

60 = 80 + a \times (\frac{5}{3600})

or,

a = - 14400 km / h²

(As body is retarding)
Hence, the acceleration is

- 144000 km / h² .

Watch 3-min video & get full concept clarity

JEE

NEET

Foundation JEE

Foundation NEET

CBSE