Question

A bus increases its speed from 20 km/h to 50 km/h in 10 seconds. Its acceleration is
(a) 30 m/s2 (b) 3 m/s2 (c) 18 m/s2 (d) 0.83 m/s2
Choose the correct answer.

Answer 1

Answer:

v2- v1= at

(50-20)1000/3600=a(10)

300/36=a(10)

a= 30/36

a=0.8333m/s2

Answer 2

Answer:

Here,u=20km/h

=5.556m/sec

v=50km/h

=13.889m/sec

t=10sec

From equation 1st of motion,we have:

v=u+at

v-u=at

13.889-5.556=a×10

8.33=a×10

8.33÷10=a

0.833m/sec sq.=a

HOPE IT HELPS YOU☺️!!