Question

A car accelerated to a velocity of 80m/s in 15s covering 900m. What were the average and the initial velocities?

Answer 1

The average velocity of the car is 60 m/s and the initial velocity is 20 m/s.

Step-by-step explanation:

To find the average velocity, we can use the formula:

Average Velocity (V) = Displacement (Δx) / Time (Δt)

Given that the car covered a displacement of 900m in a time of 15s, we can substitute these values into the formula:

V = 900m / 15s = 60m/s

So, the average velocity of the car is 60 m/s.

The initial velocity of the car can be calculated by subtracting the average velocity from the final velocity. The final velocity of the car is given as 80m/s. Therefore, the initial velocity can be found as:

Initial Velocity = Final Velocity - Average Velocity

V₀ = 80m/s - 60m/s = 20m/s

So, the initial velocity of the car is 20 m/s.