Question

A car is accelerating uniformly as it passes two checkpoints that are 80m apart. The
time taken between checkpoints is 8s, and the car’s speed at the first checkpoint is 5m/s.
Find the car’s acceleration and its speed at the second checkpoint

Answer 1

Answer:

acceleration is 5/4 m/s^2 and speed at 2nd checkpoint is 15 m/s

Explanation:

Let acceleration be a m/s^2.

initial velocity(u) = 5 m/s.

Displacement(s) = 80m

Time taken(t) is 8s

s = ut + 1/2 at ^2

substitute the values and solve the equation ,u get a = 80/64 = 5/4

let v be final velocity

v = u + at

solve u get v = 15 m/s