Answer:
4 s.
Explanation:
Acceleration: This can be defined as the rate of change of velocity of a body. The S.I unit of acceleration is m/s.
The formula for acceleration is given as,
From newton's equation of motion,
a = (v-u)/t........................... Equation 1
Where a = acceleration of the car, v = final velocity of the car, u = initial velocity of the car, t = Time interval.
Make t the subject of the equation.
t = (v-u)/a ........................ Equation 2
Given: v = 8.0 m/s, u = 5.0 m/s, a = 0.75 m/s²
Substitute into equation 2
t = (8-5)/0.75
t = 3/0.75
t = 4 s.
Hence the time interval the acceleration will occur = 4 s.
