Experiment 11 Oscillation

Experiment 11 Oscillation

Topic: Simple Harmonic Motion

Title: Oscillation 

Objective: To determine the mass of a spring

Theory:

A body of mass m is suspended on a coil spring with spring constant k is displaced from its equilibrium position and released.

If the amplitude of oscillation of the body is relatively small, its motion is simple harmonic and its period of oscillation T is given by

where m is the mass of the object and MS the mass of the spring.

Apparatus:

1. A retort stand with clamp 
2. Eight 20 g slotted masses
3. A 50 g mass hanger
4. A stopwatch
5. A soft spring
6. A weight to stabilizing the retort stand

Procedure:

(a)    Set-up the apparatus as shown in Figure below.

(b)    Attach the 50 g hook to the spring.

(c)    Displace the mass about 2-3 cm and release it.

(d)    Measure and record the time for 20 oscillations.

(e)    Repeat step (d) with different masses.

( f)    Plot a graph of T2 against m.

 (g)    From the graph, determine the mass of the spring, Ms.

Figure Exp11- 1. The spring that attach to retort stand have to be fix not moving and always vertical to the ground during 20 oscillation.