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Newton's Laws Review (Honors) Flashcards | StudBud
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Newton's Laws Review (Honors)
Newton's Laws Review (Honors)
15 terms
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StudBud Administration
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A review of Newton's laws and friction for honors physics.
Flashcards
15 cards
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Practice quiz
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Questions
15
Answers
1
If the horse in the picture weighs 10,000 N, what is the normal force acting on it?
A bit more, because the ground has to support the rider too
10,000 N
0 N, because the horse is at rest
A bit less, because the rider exerts a downwards force
2
Inertia is the tendency of things to...
Go in circles
Coast (or roll) to a stop
Keep trying the same thing even if it doesn't work
Keep the same velocity (or lack of)
3
Karen weighs 600 N and is in an elevator ascending at constant speed. Her normal force is...
600 N, because the elevator is not accelerating
Over 600 N, because the elevator is going up
0 N, because tension acts on Karen, not the normal force
Under 600 N, because gravity is cancelled out
4
What is the weight of a 1000-kg horse?
10,000 kg
1000 N
1000 kg
10,000 N
5
Two objects collide. One is substantially larger. The force on which object is greater?
It depends on how fast they're both going
They're the same
The heavier one
The lighter one
6
What direction does friction point?
Perpendicular to a surface
Opposite of applied force
Towards you
Opposite of motion
7
Two objects collide. Why is one affected more?
It has a greater force acting on it
It was moving slower
It has less mass and less inertia
It is just unlucky - it's random
8
Homer pulls a 5000 N stone at a constant speed. μ is 0.6. What force does he have to apply?
3000 N
8333 N
0 N (it's going at constant speed!)
0.00012 N
9
An object hangs at rest from a string. Which of the following is
not
true?
Gravity does not act on the object
The force of tension is equal to the object's weight
The object is not accelerating
The net force is 0
10
Geoff finds that μ between his car's tires and the ground is 10. This is wrong because...
μ must be negative if the car goes forwards
μ is usually less than 1
He forgot the units and his teacher is super picky like that
μ should be 9.8
11
A 3000 N force pulls up on a mass which weighs 1000 N. What is the acceleration of the mass?
2 m/s2
4000 N
2000 N
20 m/s2
12
What are the units for μ, the coefficient of friction?
It has no units
kg m/s2
N
1/N
13
Who wins a tug of war?
The fastest team
The stronger team
The taller team
The heavier team
14
A box sits at rest on an inclined plane. Which is true?
Fg = Fn
Ff = Fg
Fg > Fn
Ff + Fn = Fg
15
Which of the listed forces does
not
act on a sprinter?
Tension
Normal force
Friction
Gravity
