centripetal force lab (DCP, CE)

The first 200 words of this essay...

Centripetal Force

Aim: To investigate the relationship between the rotation period T and the hanging mass M when an object is moving at a constant speed in circular motion.

Variables:

Independent variable

Hanging mass

Dependent variable

Rotation period

Control variables

- Number of rotation period

- Length of string

- Mass of the rubber stopper

- Friction/ air resistance

Apparatus:

Meter stick, electric balance, timer, strings, rubber stopper, mass, plastic tube

Method:

Data Collection

length of the string L = 35.0 cm ± 0.1cm = 0.350 m ± 0.001 m

mass of the rubber stopper = 38 g ± 1g = 0.038 kg ± 0.001 kg

The uncertainty of the string's length, mass of the rubber stopper and time is taken to the smallest division of the measuring device (meter stick to measure length of string, electric balance to measure mass of stopper, stopwatch to measure time taken to complete 10 rotation period).

Raw Data

hanging mass/ g ± 1g

time taken for 10 rotation/ s ± 0.01s

Average time for 10 rotation/ s ± 0.01s