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Physics: Unit 4 Review (Forces & Newton's Laws) Flashcards | StudBud
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Physics: Unit 4 Review (Forces & Newton's Laws)
Physics: Unit 4 Review (Forces & Newton's Laws)
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1
A cyclist is moving towards the left at
constant velocity
. The net force on the cyclist must be…
Positive
Zero
Negative
2
You are standing in an elevator that is accelerating upwards. How do you feel?
Heavy
Light
Sleepy
Normal
3
Acceleration is in the same direction as:
Net Force
Velocity
Speed
Displacement
4
Your weight is greatest…
On Earth
In Outer Space
Trick Question: weight never changes
On the Moon
5
Force is a…
Scalar
Vector
6
For the following free-body diagram (angle of force = 45 deg), in what direction does the friction force act?
Right
Left
45 deg above horizontal
45 deg below horizontal
7
F =
m / a
a / m
ma
mv
8
Which of the following statements about Static Friction is FALSE?
If you push and object and it doesn't move, Static Friction = 0
Maximum Static Friction is greater than Kinetic Friction
Maximum Static Friction increases linearly with an object's weight
Static Friction is measured in Newtons
9
A skydiver is falling at terminal velocity. What must be true about the net force acting on her?
Net Force = 0
Net Force points downwards
Net Force points upwards
Cannot be determined from information given
10
Your mass is greatest…
On the Moon
On Earth
In Outer Space
Trick Question: mass never changes
11
The mass of an object affects the drag force acting on it.
True
False
12
Normal Force always acts...
Up
At a 45 degree angle
Down
Perpendicular to the surface
13
A 10 kg box is sitting on the floor. What is the resulting normal force on the box?
10 N
0 N
10 kg
98 N
14
What unit is force measured in?
Newtons
Grams
Kilograms
Kips
15
You push a box with a horizontal force of 100 N. It doesn't move. What's the friction force acting on the box?
Greater than 100 N
100 N
Less than 100 N
0 N
