Hi,
I'm revising for a test tomorrow. Just trying to find the displacement of a car.
I'm getting 2 different answers with different equations. Where am I going wrong?
car.jpg

Hi,
I'm revising for a test tomorrow. Just trying to find the displacement of a car.
I'm getting 2 different answers with different equations. Where am I going wrong?
car.jpg
Your final velocity v is not your average velocity. The average velocity under contant a is (v initial + v final )/2
You can now multiply the average velocity to obtain total distance 10 x 8 = 80
20 x 8 is incorrect.
The distance travelled is time x average velocity.
Also the distance travelled x = 1/2 at^2 +v initial t = 1/2 at^2 = 0.5 * 2.5 * 8 * 8 =80
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