When a force of F is applied to an object with a mass of M it causes an acceleration of A. If the same force is applied to an object with a mass of 4M, what is the acceleration?
A/4
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20
What must be true about acceleration and velocity if an object is slowing down?
acceleration and velocity must be in opposite directions
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15
T/F: If the acceleration is zero the object must be at rest.
False: an object can be moving with any constant velocity not necessarily 0 m/s
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25
What is the displacement in the first 1s?
2.5 m (area under the v-t graph is equal to the displacement)
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15
How do you calculate the weight of an object?
weight = gravitational force = mg = m x -9.8
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5
Which is greater static friction or kinetic friction?
static friction
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thief
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seesaw
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rocket
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banana
Go to last place!
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15
What do you know about the velocity if the forces on an object are balanced?
velocity is constant
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10
What force typically opposes the gravitational force?
normal force (sometimes tension force)
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eraser
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gift
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rocket
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lifesaver
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15
When an object is thrown up into the air what is the velocity at the highest point (peak of the parabola)?
0 m/s
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heart
Other team wins 5 points!
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magnet
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fairy
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thief
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10
T/F: If an object has a velocity of -3 m/s it must be slowing down.
False; -3 tells us the object is moving in the negative direction (left) we know nothing about whether it is speeding up or slowing down bc we do not know a
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10
Name the force involving strings (or things similar to strings).
Tension force
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10
What does the slope of a displacement (position) v. time graph tell you?