Get premium membership and access questions with answers, video lessons as well as revision papers.

Describe an experiment to determine acceleration due to gravity.

      

Describe an experiment to determine acceleration due to gravity.

  

Answers


sharon
This can be done as follows:
4242019858.png
- Set the apparatus as shown in the diagram above. Set the length of the string at 30cm. note that the length l is measured from the centre of the bob.
- Displace the bob sideways through a small angle of about 20 and release it so as to oscillate.
- With the help of a stop watch, measure and record the time for ten oscillations (allow some little oscillations after release before timing). Repeat this step twice or thrice and determine the average time.
Hence calculate the period T(time for one oscillation).
- Repeat the above steps for l=40cm, 50cm, 60cm, 70cm and 80cm. complete the table below:

4242019900.png
- plot a graph of T2 against length l in metres.

Observations and conclusion
The frequency of oscillation increases with decrease in length of the string. A graph of T2 against length l is a straight line through the origin.
Generally, a graph of T2 against length for a simple pendulum satisfies the equation T2=4p2l/g.
Hence, the slope of the graph above is equals to 4p2/g.
4242019907.png

sharon kalunda answered the question on April 24, 2019 at 06:09


Next: List the personal abilities needed for one to succeed in a business.
Previous: Highlight three practical examples where the Newton’s first law of motion is applied.

View More Physics Questions and Answers | Return to Questions Index


Learn High School English on YouTube

Related Questions