Homework Help: Help! Equation needed

1. Nov 14, 2007

Joeirvin

I am studying A Level Physics, and for a piece of coursework i conducted an experiment using an air track. It involved using masses on a piece of string to pull a vehicle. I had two light gates set up to measure the time from a to b, however the first light gate was not set so that the initial velocity was zero..

Could anyone give me an equation to work out either, acceleration, initial velocity, or final velocity?

The masses go at intervals as follows, these are in grams..
20
40
60
80
100
120
140
160
180
200

The average time for each of these is shown below (the same order as above) all of these are in seconds..

1.772
1.004
0.82
0.616
0.54
0.508
0.472
0.45
0.436
0.414

The distance between the two gates is 0.89m and the mass of the vehicle is 410grams

Any help would be great thanks.

2. Nov 14, 2007

Kurdt

Staff Emeritus
What force will be acting on the vehicle? Once you know the force you can work out the acceleration and use the kinematic equations.

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