Question

The speed of a car when passing point p is 30ms⁻1 and change uniformly over a distance of 323m to 60ms⁻1. Calculate the speed of the car 3s after passing p?​

Answer 1

To calculate the speed of the car 3s after passing point p, we can use the equation v = u + at, where v is the final velocity, u is the initial velocity, t is the time, and a is the acceleration.

Step-by-step explanation:

To calculate the speed of the car 3s after passing point p, we need to determine the acceleration of the car during the initial change in speed. We can use the formula:

v = u + at

Where v is the final velocity, u is the initial velocity, t is the time, and a is the acceleration.

Given that the initial speed is 30 m/s, the final speed is 60 m/s, and the distance covered is 323 m, we can rearrange the formula to solve for acceleration:

60 = 30 + a(3)

30 = 3a

a = 10 m/s²

Now, we can calculate the speed of the car 3s after passing point p:

v = u + at

v = 30 + (10)(3)

So, the speed of the car 3s after passing point p is 60 m/s.