Question

4. A racing car has an acceleration of 4 metre per second square what distance will it cover in 20
seconds after the start? *
(1 Point)
800m
600m
900m
1600m​

Answer 1

Answer:

answer in attachment

Answer 2

Answer:

It will cover 800 m.

Solution :

Acceleration = 4 m/s²

Time = 20 seconds

Distance = ??

Velocity = ??

Initial Velocity = 0

To get the velocity, we'll use :

★ v = u + at

⇒ v = 0 + 4(20)

⇒ v = 80 m/s

Now that we have velocity we can find the distance.

★ v² = u² + 2as

⇒ (80)² = 0 + 2(4)(s)

⇒ 6400 = 8s

⇒ s = 6400/8

⇒ s = 800

Therefore, it will cover 800 m.