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alukav5142 [94]
3 years ago
7

a car accelerates from rest at 3 m / s^2 along a straight road. how far has the car travelled after 4 s

Physics
1 answer:
evablogger [386]3 years ago
4 0

Answer:

24 m

Explanation:

The motion of the car is a uniformly accelerated motion (=at constant acceleration), therefore we  can find the distance covered by using the following suvat equation:

s=ut+\frac{1}{2}at^2

where

s is the distance covered

u is the initial velocity

t is the time elapsed

a is the acceleration

For the car in this problem:

u = 0, since the car starts from rest

a=3 m/s^2 is the acceleration

t = 4 s is the time elapsed

Therefore, the distance covered is:

s=0+\frac{1}{2}(3)(4)^2=24 m

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