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Short version Patterns Physics - Friction & Newton's Laws Flashcards | StudBud
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Short version Patterns Physics - Friction & Newton's Laws
Short version Patterns Physics - Friction & Newton's Laws
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#physics #freshman #friction #Newton's Laws
Flashcards
16 cards
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Questions
16
Answers
1
What is the approximate weight of a 125 kg mass on Earth?
135 Newtons
1150 Newtons
12.5 Newtons
1250 Newtons
2
How much force is needed to keep a ball moving in outer space?
Depends on the ball's acceleration
Depends on the ball's mass
Depends on both the ball's mass and velocity
None
3
In a closed, isolated system, if a moving ball strikes a ball at rest, what happens?
Total momentum of the system decreases
The object at rest remains at rest
Total momentum of the system increases
Total momentum of the system remains the same
4
2 people are pushing a car together. One with force of 200 N, the other 150 N. Net force?
350 S
50 S
50 N
350 N
5
A pack of dogs is pulling a 50kg sled with an acceleration of 2m/s/s. What is the Net Force?
100 N
0 N
25 N
250 N
6
Solve F = ma for m
m = a/F
m = F/a
m = F - a
m = Fa
7
Calculate the force needed to accelerate a child on a sled at 1.2 m/s
2
. The total mass is 60kg.
72 N
50 N
84 N
60 N
8
Compared to its mass on Earth, an object's mass on the moon would be...
Less than
Zero
The same
Greater
9
An object's speed will _____ if the net force is acting in the direction opposite of its motion
Decrease
Increase
Stay the same
Not enough information to determine
10
What would happen to a stationary object if balanced forces acted on it?
It would increase velocity at an increasing rate
It would remain at rest.
It would accelerate at a constant rate
Friction would slow it down
11
Which of the following statements about the weight and mass of an object is correct?
Mass varies depending on where it is measured
Weight varies with the force of gravity acting upon it
Weight is the same regardless of where it is measured
12
What do we call the force that results from two surfaces interacting, such as between a shoe and the floor?
Friction
Inertia
Weight
Normal
13
a= F/m : What kind of relationship exists between a and m?
Inverse
quadratic
linear
horizontal
14
Without air resistance, objects fall at constant...
Distances each successive second
Acceleration
Velocity
Speed
15
Acceleration is always in the direction of...
Friction
Applied force
Net force
Gravity
16
Force of friction = ___________ x Weight
coefficient of friction, μ
acceleration, a
traction, Ff
mass, m
