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

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:

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

is the acceleration

t = 4 s is the time elapsed

Therefore, the distance covered is:

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.