Newton’s second law

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21 Terms

1
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Lizzie is pushing Alex on the scooter. Lizzie is pushing with 75 n of force to the left and Alex is helping with 20 n to the left. What is the net force on the scooter?

95n to the left

2
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In order to determine an object location, you need a

Reference point

3
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Motion can be described through a change in

Position

4
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A train travel, 250 km from a starting point in five hours if the train continues at the same average speed for another four hours, how far will I have traveled from the starting point?

450 km

5
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This term refers to how fast an object is moving

Speed

6
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What does a speedometer in a car measure

instantaneous speed

7
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Vectors quantities include

Amount and direction

8
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In physics, a push or a pull is known as

A force

9
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According to Newton, second law, how will a larger force affect the motion of an object?

More acceleration

10
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<p>What is a net force?</p>

What is a net force?

0 n

11
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True or false Forces that are equal in size with opposite and direction are called unbalanced forces

False

12
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True or false if a net force acts on an object, the object may change speed direction or to neither

False

13
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True or false balance versus acting on an object cause the object to accelerate

False

14
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True or false friction always acts in the same direction as motion

False

15
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True or false change in direction with no change in speed is one type of acceleration

True

16
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<p>What is Kathy’s average speed?</p>

What is Kathy’s average speed?

150 miles

17
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<p>How long after Kathy started jogging did Rachel begin jogging</p>

How long after Kathy started jogging did Rachel begin jogging

After two minutes

18
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<p>Describe Rachael’s motion at nine minutes</p>

Describe Rachael’s motion at nine minutes

Stopped

19
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You’re riding in a car traveling at 80 km a fly trapped in the car on your shoulder describe the speed of the fly using two different reference points

The car is going 80 km/h the fly on your shoulder is not moving at all because your shoulder is also not

20
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Explain how to find the average speed of a car that travels 300 km in six hours then find the average speed

Divide. 50 km.

21
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