Physics Test Study Guide
1. What does Newton's 2nd law of motion tell us about the motion of objects?
The bigger the force on an object, the faster it will go. The bigger the mass of the object, the harder it is to get it to speed up, slow down, or change direction.
2. What are the steps to designing an experiment?
List all of the variables.
Choose a variable to test - this is the independent variable.
Determine the dependent variable and figure out how to measure it.
Figure out how to keep all of the other variables the same.
Make a data table to record your data in - graph your data if necessary
Interpret your data and make a conclusion
3. How many variables can you test at one time in an experiment? What should you do to all the other variables?
You can only test one variable at a time. You need to keep all other variables the same.
4. What is the independent and dependent variables in an experiment?
Independent - the one you change, the one you're testing
Dependent - the one that changes because of what you change, the result what you change, it changes depending on the variable you change
5. What does Newton's 1st law of motion tell us about the motion of objects?
Objects will stay in motion unless a force changes their motion (speeds them up, slows them down, or changes their direction). If it's at rest, it will stay at rest until a force moves it.
6. Use Newton's 1st law of motion to explain the following:
a. When you hit the brakes on your car, your body moves forward because it stays in its forward motion until the seatbelt or the windshield stop you.
b. When you are on a spinning amusement park ride, you feel like you are being pushed to the outside because your body wants to keep going in a straight line until the ride pushes on you.
c. When you accelerate quickly in your car, you feel pushed into your seat because your body wants to stay at rest until the car pushes on you.
7. You have designed a device to protect an egg from breaking when it hits the ground. Your design includes a parachute. Draw all of the forces on your device as it is falling and as it hits the ground.
The bigger the force on an object, the faster it will go. The bigger the mass of the object, the harder it is to get it to speed up, slow down, or change direction.
2. What are the steps to designing an experiment?
List all of the variables.
Choose a variable to test - this is the independent variable.
Determine the dependent variable and figure out how to measure it.
Figure out how to keep all of the other variables the same.
Make a data table to record your data in - graph your data if necessary
Interpret your data and make a conclusion
3. How many variables can you test at one time in an experiment? What should you do to all the other variables?
You can only test one variable at a time. You need to keep all other variables the same.
4. What is the independent and dependent variables in an experiment?
Independent - the one you change, the one you're testing
Dependent - the one that changes because of what you change, the result what you change, it changes depending on the variable you change
5. What does Newton's 1st law of motion tell us about the motion of objects?
Objects will stay in motion unless a force changes their motion (speeds them up, slows them down, or changes their direction). If it's at rest, it will stay at rest until a force moves it.
6. Use Newton's 1st law of motion to explain the following:
a. When you hit the brakes on your car, your body moves forward because it stays in its forward motion until the seatbelt or the windshield stop you.
b. When you are on a spinning amusement park ride, you feel like you are being pushed to the outside because your body wants to keep going in a straight line until the ride pushes on you.
c. When you accelerate quickly in your car, you feel pushed into your seat because your body wants to stay at rest until the car pushes on you.
7. You have designed a device to protect an egg from breaking when it hits the ground. Your design includes a parachute. Draw all of the forces on your device as it is falling and as it hits the ground.
8. Use Newton's 3rd law to describe the forces on your egg drop device.
As the parachute pushes down on the air, the air pushes up on the parachute, making it slow down.
As the device hits the ground, the ground pushes back, possibly breaking the egg.
9. Draw what happens to iron filings when they are near a bar magnet.
As the parachute pushes down on the air, the air pushes up on the parachute, making it slow down.
As the device hits the ground, the ground pushes back, possibly breaking the egg.
9. Draw what happens to iron filings when they are near a bar magnet.
10. How do the number of coils on an electromagnet affect the strength of the an electromagnet?
The more coils there are, the stronger the magnet will be.
11. How does the amount of electricity moving through a wire affect the strength of an electromagnet?
The more electricity, the stronger the magnet will be.
12. What would you do to make the strongest electric motor possible?
You would have a lot of coils of wire and a lot of electricity moving through it.
13. Graph this data - see example in class.
14. How does your mass change on the moon? How does your weight change on the moon? Why?
You mass doesn't change but your weight is less on the moon. This is because the mass of the moon is smaller, so the gravity on the moon is smaller.
15. How does your mass change on Jupiter? How does your weight change on Jupiter? Why?
You mass doesn't change but your weight is more. This is because the mass of the Jupiter is bigger, so the force of gravity is bigger.
The more coils there are, the stronger the magnet will be.
11. How does the amount of electricity moving through a wire affect the strength of an electromagnet?
The more electricity, the stronger the magnet will be.
12. What would you do to make the strongest electric motor possible?
You would have a lot of coils of wire and a lot of electricity moving through it.
13. Graph this data - see example in class.
14. How does your mass change on the moon? How does your weight change on the moon? Why?
You mass doesn't change but your weight is less on the moon. This is because the mass of the moon is smaller, so the gravity on the moon is smaller.
15. How does your mass change on Jupiter? How does your weight change on Jupiter? Why?
You mass doesn't change but your weight is more. This is because the mass of the Jupiter is bigger, so the force of gravity is bigger.