Answer on Mechanics | Relativity Question for Susan
two cars traveling from the same place at the same time and travel in opposite directions. one car travels an average of 20 kph faster than the other. After 2 hours the cars are 40okm apart. find the speed of each car.
Let's the first car speed be V. Then the speed of the other car is V+20 and the distance between them after 2 hours would be D = 2V + 2(V+20). From the other side, D=400km. Hence 2V + 2(V+20) = 400 ==> V = 80. So, the first car's speed is 80km/h and the second one's is 80+20=100km/h.
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Some things in the chapter attachments I sent you are not clear. They do not have much solved examples either.
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