TRUE OR FALSE: To represent a force, you can use either the point of application (where the force acts), scalar value, and the direction.
TRUE.
15
The unit of force is...
N (Newton)
20
What is the resultant force?
0 N
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What is the resultant force?
None
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What Newtons law does this picture represent:
1st Law
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"Heavier objects need a larger force to make them move." What Law of Motion is this?
2nd
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Dave runs 2000 m in 25 minutes. What is the speed?
80 m/m
25
How do you calculate average speed?
total distance divided by total time
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Change in speed or velocity over a specific amount of time. What is this?
Acceleration
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A bus starts from rest and accelerates to 14 m/s in 4 s. What is the average acceleration of the bus?
3.5m/s^2
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A golf ball accelerates off a tee at 15m/s2, changing its velocity from 0m/s to 50 m/s down the fairway. How long did it take the golf ball to accelerate?
3.3 seconds
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A roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What's the acceleration?
16 m/s^2
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A dog runs with an initial speed of 7.5 m/s on a waxed floor. It slides to a stop in 15 seconds. What is the acceleration?
-0.5 m/s^2
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How fast is the car traveling at 30 seconds?
20 m/s
20
The gravitational strength on Neptune is 11.0 N/kg. If the weight of a rover is 13,200 Newtons, what is the mass of it?