Forces: hooke’s law practical

Question 1

What is step one of this method?

Answer 1

It is always, for any method you write, SET UP THE APPARATUS SHOWN IN THE DIAGRAM

Question 2

What shouldn’t be on the spring when you start the practical?

Answer 2

A mass. Any mass. Any force exerted, take it away

Question 3

What’s step two of the practical?

Answer 3

Align the Fiducial marker to the point on the ruler where the end of the spring is. This is the original point. If you wanted to original length (equally as helpful), find where the spring starts and use the Fiducial marker to find where the spring starts. Like it up with a measurement on the ruler. Take this number away from the original point and there’s the original length.

Question 4

Why is it useful to know the original point/original length?

Answer 4

It will be helpful later on when you want to find the extension

Question 5

What is step three in the practical?

Answer 5

Add a 100g mass onto the the spring. Or a 1N mass. Or whatever. Just make sure it’s constant throughout the practical.

Question 6

What’s step 4 of the practical?

Answer 6

Record the mass (in kg) onto the table of results. Record the position (in cm) on the ruler from where the end of the extended spring is

Question 7

What is step 5?

Answer 7

Add another 100g mass, or 1N mass. Whatever constant there is

Question 8

What’s step 6 on the practical?

Answer 8

Record the mass (in kg) into the table of results. Record the new position from the ruler (in cm) from where the new extended spring ends

Question 9

Why should mass be recorded in the table of results as kg?

Answer 9

It will help later on, because we aren’t given the force in Newtons, you can covert it to Newtons using W = mg

Question 10

What is step 7-unknown?

Answer 10

Keep repeating the steps above until you hand all the masses onto the spring

Question 11

What is the final conclusive step(s) to this practical?

Answer 11

Remove all masses off the spring and replace the spring with a different type of spring before repeating the whole process from step one back to this step again

Question 12

Why do we test diff. types of springs? And what kind of different springs can we test?

Answer 12

We test them for reliability and compatibility for Hooke’s law on different springs to make sure the law still applies. Different springs include: a thicker spring, a thinner spring, two conjoint springs

Question 13

What are the two types of errors that can be made in this practical?

Answer 13

Systematic and random

Question 14

What systematic error are we trying to avoid?

Answer 14

Make sure you are eye level with the ruler when you take the measurements to avoid parallax errors

Question 15

What random error could occur in this practical?

Answer 15

There will be lesser risk of random error if you use a Fiducial marker (which you will). Likewise, without one, or use it wrong and your results could be messed up

Question 16

What three safety protocols are we taking in this practical?

Answer 16

Wear Goggles in case your spring snaps
Stand up whilst carrying out this practical and make sure your feet aren’t directly underneath the masses
Use a G clamp to secure stand to table to prevent everything from toppling over

Question 17

How do we find the final extensions for each set change of masses

Answer 17

You need to take the original length away from final length. To do this, take the points recorded from ruler of where extended springs end and take away the point recorded of where the spring starts from it. The result is the final length