Question

how are melting points used

Answer these questions before coming to the lab and turn in your answers at the beginning of the lab to get credit. Turning this pre lab question sheet later would result in not getting any credit for the pre lab. Period T is defined as the time required for an object with mass M attached to a string length L to complete one cycle of motion. For small oscillations of a pendulum we have T=21V where L= length of the string (in m). g= 9.80 m/s, and T=period of time to complete one cycle of its motion (in s). 1. Show a free body of the pendulum while in equilibrium. 2. If the mass of the pendulum is 50g, what is the tension in the string? Show all equations and calculation to get credit. 3. If you cut the string in half, would the period be longer or shorter? By what factor? Explair your answer. 4. If you double the attached mass, how does the period T change? Explain your answer.

Answer 1

. given by Time period of pendulum is T- २ where 2 = length of string g=9.80 mis? length of string. on the in string mass of Gob mg

6 : Tension t = mg = (50) (9.8) - mass ms 50g (given) & = (50x103) (9.8) 9 - 9.8mis? t = 49.0x103 It = 0.049 N

& If doing is cut to half Ta VL Ta 2T

Time period will be shorley By factor of V2. Time period is dependent on Length of string as IT QE 6 Time period of pendulum at is independent of mass Hence when we double the mass & time period is unchanged. as T depends on 28 g only