1. Forces & Motion Quiz

2. Q1: What does Inertia really mean?
A: How hard it is to make something move, stop moving or change direction

3. A: The carpet has more friction than the tile floor.
Q 2: I pull a cart with boxes across the floor. The surface changes from carpet to tile. Why do I have to pull/push harder on the carpet to move the same cart?
A: The carpet has more friction than the tile floor.

4. A: Graph B (steeper lines mean faster motion)
Q 3: Which graph shows an object moving slowly (when compared to the other)
A: Graph B (steeper lines mean faster motion)
Graph B
Distance
Distance
Graph A
Time
Time

5. Q 4: A change in direction or speed is known as _________
A: Acceleration

6. A: Left hand player is pushing with more force
Q 5: If both of these football players have the same mass, why is the one on the right falling backwards
A: Left hand player is pushing with more force

7. Q 6: Which of Newton’s 3 Laws of Motion explains why objects with mass don’t just start moving by themselves?
A: The First Law. “An object at rest will stay at rest unless an outside force acts upon it.”

8. A: Graph A (changes in the slope show acceleration)
Q 7: Which graph shows an object accelerating (when compared to the other)?
A: Graph A (changes in the slope show acceleration)
Graph B
Graph A
Distance
Distance
Time
Time

9. A: Use twice as much force
Q 8: If I want to accelerate an object with twice as much mass as another object, what do I have to do?
A: Use twice as much force

10. A: No change in motion (no acceleration)
Q 9: If all the forces are in balance, what will the motion of an object be?
A: No change in motion (no acceleration)

11. Q 10: What is the unit of measurement for Force?
A: Newton (N)

12. Q 11: Which of Newton’s 3 Laws of Motion explains why someone falls backward when punched really hard?
A: The Third Law. “For every action there is an equal and opposite reaction”

13. A: Up the slope includes moving against friction and gravity.
Q 12: Why does it take more force to pull a block up a slope than just along the ground?
A: Up the slope includes moving against friction and gravity.