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- 1. Drop down10 minutes2 pts
An object at rest will remain ​ (a) and an object in motion will remain ​ (b) unless an outside force acts on the object.
at restin motionat a constant speedin an unbalanced state - 2. Multiple-choice10 minutes1 ptBalancedUnbalanced
- 3. Multiple-choice10 minutes1 ptBalancedUnbalanced
- 4. Multiple-choice10 minutes1 ptBalancedUnbalanced
- 5. Multiple-choice10 minutes1 pt
Which of the following correctly describes a system with a net force of 0N?
The system would be balanced, therefore the object would move
The system would be balanced, therefore the object would not move
The system would be unbalanced, therefore the object would move
The system would be unbalanced, therefore the object would not move
- 6. Multiple-choice10 minutes1 pt
What is the unit for force?
Joules (J)
seconds (s)
Newtons (N)
meters (m)
- 7. Multiple-choice10 minutes1 pt
A bus travels 20 km in 30 minutes. What is the average speed of the bus?
20 km/hr
30 km/hr
40 km/hr
My answer choice is not listed because I didn't remember to change minutes to hours!!!!!!!
- 8. Multiple-choice10 minutes1 pt
A bicycle rider is traveling up a hill. When the rider reaches the top of the hill, she stops to rest. Then she travels down the hill. The diagram shows the rider in the three different positions.
Which of these correctly describes the potential energy and the kinetic energy of the bicycle rider?
When the rider is at the top of the hill, her potential energy is the greatest, and her kinetic energy is the least.
As the rider moves up the hill, her kinetic energy increases, and her potential energy decreases.
When the rider goes down the hill, her potential energy increases, and her kinetic energy decreases.
As the rider reaches the bottom of the hill, her kinetic energy and her potential energy decrease.
- 9. Open-ended10 minutes1 pt
Is this Balanced or Unbalanced?
What is the Net Force?
What is the Direction of the Force?
- 10. Open-ended10 minutes1 pt
Is this Balanced or Unbalanced?
What is the Net Force?
What is the Direction of the Force?
- 11. Open-ended10 minutes1 pt
Is this Balanced or Unbalanced?
What is the Net Force?
What is the Direction of the Force?
- 12. Open-ended10 minutes1 pt
Is this Balanced or Unbalanced?
What is the Net Force?
What is the Direction of the Force?
- 13. Multiple-choice10 minutes1 pt
What is inertia?
Objects changing their motion on their own.
Objects moving in a straight line.
Objects staying still when they are acted on by a force.
Objects not changing motion unless acted on by an unbalanced force.
- 14. Multiple-choice10 minutes1 pt
A book sits still on a table. What forces act on the book?
Gravity pulls down and the table pushes up.
Only gravity pulls down.
Gravity pulls down, the table pushes up, and friction keeps it still.
Gravity pulls down and inertia keeps it still.
- 15. Open-ended10 minutes3 pts
Explain how seatbelts in a vehicle demonstrate one of Newton's laws of motion. (Must include which of the law's and be in complete sentences to recieve full credit)
- 16. Open-ended10 minutes3 pts
Explain your results from our car and ramp lab. How does this demonstrate one of Newton's Laws? (must include which law and be in complete sentencecs to receive full credit)
- 17. Multiple-choice10 minutes1 ptWhich object has the greatest inertia?A 1-kilogram object moving at 15 meters per secondA 5-kilogram object at restA 10-kilogram object moving at 2 meters per secondA 15-kilogram object at rest
- 18. Multiple-choice10 minutes1 ptWhat is the net force?5000 N right4000 N right40 N left4000 N left
- 19. Multiple-choice10 minutes1 ptA 20 kg bike accelerates at 10 m/s2. What was the force?25 Newtons20 Newtons200 Newtons10 Newtons
- 20. Multiple-choice10 minutes1 ptA change in velocity over time is called ___________.speedforceaccelerationdirection
- 21. Multiple-choice10 minutes1 ptHow much force is needed to accelerate a 2 kg physics book to an acceleration of 6 m/s/s?36 N12 N3 N0.33 N
