How do you perform a Hooke’s Law experiment?
Objective: Investigate how extension of a spring depends on the force applied.
Equipment:
Spring
Stand and clamp
Masses (known weights)
Ruler or meter stick
Pointer (optional, attached to spring)
method of hooks law
1.Attach the spring to the clamp stand.
Measure the original length of the spring .record where the pointer is on the meter ruler with no weight addded
2.add 1 N weight , record the new position of the pointer and calculate the extension
3.repeat wih more weights, calculating the extension from the start position each time
4.saftety:clamp the stand to the bench so it doesn’t fall over
what are the variables
Independent variable (changed): Force applied (F) – add different masses.
Dependent variable (measured): Extension of the spring (e).
Control variables (kept the same):
Same spring
Original length of spring
Temperature
Clamp setup
How do you investigate the strength of an electromagnet?
Objective: Find out how the strength of an electromagnet depends on different factors.
Equipment:
Iron nail or soft iron core
Insulated copper wire
Power supply / battery
Ammeter (optional)
Switch (optional)
Paper clips or small iron objects
Method:
Wrap the copper wire around the iron nail to make a coil.
Connect the coil to a battery.
Test the electromagnet by seeing how many paper clips it can pick up.
Change one factor at a time to investigate its effect on strength:
Number of coils
Current (by using more batteries)
Core type (soft iron vs steel)
Record the number of paper clips picked up each time.
Observation:
More coils → stronger electromagnet
Higher current → stronger electromagnet
Soft iron core → stronger than steel
Conclusion:
Strength of an electromagnet increases with current, number of coils, and a soft iron core.
