A car travels for 10s at a steady speed of 20m/s along a straight road. The traffic lights ahead change to red, and the car slows down with a constant deceleration, so that it stops after an additional 8 seconds. Use your graph to deduce how far the car has travelled during the 18 seconds described.

280 meters

Explanation:

You should get the speed

And you should use the graph….

To get the distance using the graph the rule is …(area under graph) which is equal to area of triangle + area of the rectangle

Area of triangle = 0.5 x length x width

Area of rectangle = Length x width

(0.5 x 8 x 20 ) + ( 10 x 20 ) = 280 meters

Wish this helps

c)as speed changes, wavelength and frequency change.

everything changes!

mass and volume are the answers you are looking for