Use an accelerating force of 5 N and keep this constant.
Record acceleration as additional 0.5 kg masses are added to the trolley.
Plot a graph of mass m in kg on the y-axis against acceleration a in m/s2 on the x-axis.
Draw a smooth curve through the points.
The graph is not a straight line through the origin – mass and acceleration are not directly proportional.
Plot a second graph of 1/mass in 1/kg on the y-axis against acceleration a in m/s2 on the x-axis. Draw the line of best fit
This graph is a straight line through the origin. Acceleration is directionally proportional to
We say that mass and acceleration are inversely proportional.
If you double the mass, you half the acceleration.
In other words, a resultant force on a body will cause it to change its velocity.
This simply means that unbalanced forces will cause: