simple harmonic motion

Question 1

what are the condition for simple harmonic motion

Answer 1

acceleration should be in the opposite direction to displacement

acceleration is proportional to displacement

Question 2

what does the gradient of a displacement graph give

Answer 2

velocity

Question 3

what is the phase difference between displacement and acceleration

Answer 3

180 degree

Question 4

what is the phase difference between velocity and displacement

Answer 4

90 degrees

Question 5

where is velocity maximum

Answer 5

equilibrium point where kinetic energy is also maximum

Question 6

how to calculate amplitude from pendulum using experiment

Answer 6

use ruler to calculate horizontal distance
mark both points ( equilibrium point and other point)

Question 7

best position to keep fiducial mark to reduce uncertainty in the measurement of T. T being time period

Answer 7

position fiducial mark at centre equilibrium
because this is where the kinetic energy is maximum

Question 8

graph for a mass spring system

Answer 8

rearrange to get k and plot m against t squared
when you divide m by t this is the gradient
gradient times 4 pie squared is k

Question 9

what is maximum displacement

Answer 9

it is the amplitude

Question 10

where is amplitude maximum in terms of acceleration and energy

Answer 10

amplitude is maximum where gpe is maximum and also acceleration

Question 11

how is force linked to acceleration in simple harmonic motion

Answer 11

force is similar to acceleration as they face the same direction s
and at the same position