Question

a train accelerates uniformly from 36 km per hour to 72 kilometre per hour in 10 second.find the distance travelled? ​

Answer 1

Answer:

Explanation:

36km/h = 10 m/s

72 km/h = 20 m/s

v = u +at

20 = 10 + a x 20

a = 1/2 m/s²

s = ut + 1/2at²

s= 10 x 20 + 1/2 x 1/2 x 20 x 20

s = 200 + 100

s = 300 m

so distance travelled = 300 m or 0.3 km