A car has a mass of 900 kg. It accelerates from rest at a rate of 1.2 m/s^2.
Calculate the time taken to reach a velocity of 30 m/s.
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Answer:
The time taken to reach a velocity of 30 m/s is 25 sec.
Explanation:
The mass of the car is 900kg. It accelerates from rest. So the initial velocity (u) of the car will be 0. The acceleration (a) of the car is 1.2 m/s². We need to calculate the time taken to reach the final velocity (v) of the car to a value of 30 m/s.
By using the first equation of motion;
v = u + at
t = (v-u) / a
t = (30 - 0) / 1.2
t = 30/1.2
t = 25 sec
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