Answer:

Initial Velocity = u = 0

[1 km/hr=5/18 m/s]

Final velocity = v = 75 km/hr = 75 x 5/18 = 20 m/s

Time = t = 15 sec

Acceleration = a

Equation of motion :-

v = u + a15

20 = 0 + a

a = 20/15

a = 2 m/s²

displacement = distance traveled = s

Equation of motion :-

v² - u² = 2as

20² = 2 × 2 × s

400 = 4s

s = 400/4

s = 100 m

Average velocity = displacement / time

= 100 / 15

= 7 m/s

Step-by-step explanation: