Homework Help: Physics

Posted by Ama on Thursday, October 20, 2011 at 12:20am.

A dragster and a driver together have mass of 942.2 kg. the dragster starting from rest attains a speed of 25.5m/s in 0.56 s.
1. find the average acceleration of the dragster during this time interval? I really need the formula
2. What horizontal force does the seat exert on the driver? i have the weight of the driver again i need the formula please

Physics - drwls, Thursday, October 20, 2011 at 6:45am
1. acceleration is speed change divided by time. In this case it is
a = 25.5/0.56 m/s^2

2. F = m a
where m is the driver's mass (not weight)

The answer, if you do it right, will be in newtons.

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