Forces & Motion Quiz.

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Presentation transcript:

Forces & Motion Quiz

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

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.

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

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

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

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.”

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

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

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)

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

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”

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.