Question

at a certain instant an auto driver is driving at a speed of 30 km per hour then uniformly accelerated the auto and after 2.5 minutes the speed of his auto become 60 km per hour what is the average speed of the auto what is the value of acceleration given during the given interval of time​

Answer 1

Answer:

a= .0555m/s^2

average speed = 45.5km/hr

Step-by-step explanation:

u= initial speed = 30 km/hr= 8.33 m/s

acceleration is uniform, then we apply equations of motion

time = 150 seconds

v = final speed = 60km/hr =16.67m/s

v = u+at

16.67 = 8.33 + 150a

8.33/150 = a = .0555m/s^2

Average speed = total distance/ total time

Total distance

${v }^{2} - {u}^{2} = 2as$

208.5= 2*.055*s

s= 1895.45 metres

average speed will be = 1895.45/150 = 12.63m/s = 45.5km/hr