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Force and Motion
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Which of the following is a unit of time? 1. km/hr 2. hr 3. km 4. mi
hr
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What is the net force with direction?
3N + 3N = 6N (Left)
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Which object is moving with the greatest speed?
object at D
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Describe the motion at Point B and D
They are moving at constant speed
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Taylor rides her bike 20 m North, then rides the bike 15 m back. What is her displacement?
5 m
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In the graph shown, which letter represents an object that is at rest?
C
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Ray runs 30 feet North, 30 feet West and then 30 feet South. What is his distance?
90 feet
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What is the net force with direction?
6N + 3N = 9N (Right)
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Describe the motion at Point A
The object is at rest
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What is average speed?
average speed is total distance divided by total time
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Describe the motion at Point C
speeding up / accelerating
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What is the net force and direction?
6N - 5N =1N (Right)
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Bill jogs 400 meters to the park, turns around, and runs 200 meters back towards his house. He does so in 8 minutes. What is Bill's average speed?
75 m/min
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A runner races in the 100 meter dash. It takes her 10 seconds to finish. What is her average speed?
10 m/s
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Find the velocity of a truck that travels 75 miles north in 2.5 hours.
30 mph north
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What is the net force with direction?
7N - 2N = 5N (left)
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describe the motion of the moving object
it is moving at constant speed
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Victor runs exactly5 laps around a 400 m track. What is his distance?
2000 m
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You can tell that an object is in motion relative to a
Reference point
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What is the motion from 7 sec to 10 sec
constant speed
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Jack walks 3 km North, and then turns eastand walks 4 km. What is the total distance?
7 km
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What is the net force?
4N - 4N = 0N (Balanced)
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What is the equation to calculate speed?
speed = distance/time
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Which of the following is a unit of distance ? 1. miles/hr 2. hr 3. km 4. min
km
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Jermaine runs exactly 2 laps around a 400 meter track. What is his displacement?
0 miles
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What is the velocity of a car that traveled a total of 75 kilometers north in 1.5 hours?
50 km/hr north
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David walks 3 m North, and then turns back and walks 3 m South. What is his displacement?
0 m
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Paul went north 5 miles, and then west 3 miles and finally south 2 miles. What is its distance?
10 miles
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Based on the graph, in which segment is the object at rest?
segment B
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Which of the following is a unit of speed? 1. km 2.hr 3. s 3.km/hr 4. hr/s
km/hr
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What is the formula to calculate speed?
speed= distance / time
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At what time is the object at rest?
at t = 4s to t = 7s
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