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GTHS Newton's Laws and Simple Vectors Flashcards | StudBud
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GTHS Newton's Laws and Simple Vectors
GTHS Newton's Laws and Simple Vectors
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Newton's laws, FBD, equilibrium, GTHS, vectors, forces, newton, physics
Flashcards
26 cards
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Questions
26
Answers
1
Forces are pushes or pulls. True or False
True
False
2
According to Newton's 3rd law the reason forces do not cancel is...
the action force acts for a longer time period
nonsense! They do cancel each other
the two forces act upon different objects
one of the two forces is greater than the other
3
What causes acceleration?
An object can accelerate without a force.
A net force based on the sum of all the forces.
A push or pull.
Any force acting on an object.
4
All forces are contact forces. True or false
True
False
5
Which box(es) will accelerate?
1,3,4
all of them
1,4
3
6
Speed is a quantity that has magnitude but does not have direction. Is it a...
vector
force
acceleration
scalar quantity
7
Which term is defined as the sum of all forces acting on an object?
scalar
force pair
vector
net force
8
Newton's 3 Laws in order are...
Forces, fields, gravity
Friction, Gravity, Normal
Inertia, F=ma, action/reaction
Inertia, action/reaction, F=ma
9
Which of these is a property of mass?
velocity
force
inertia
acceleration
10
Weight is
fixed, as mass does not change with gravity
changeable, depending on gravity
measured in kilograms
not dependent on mass
11
An object w/ 4 m/s
2
accel has its force incr x 2 mass decr x 4. What's the new accel?
8 m/s2
32 m/s2
2 m/s2
1/2 m/s2
12
An object accelerating at 4 m/s
2
has its mass increased by a factor of 3. What's the new accel
1 m/s2
12 m/s2
4/3 m/s2
3/4 m/s2
13
What has more inertia, a sitting jumbo jet or a speeding motorcycle?
No way to determine
Same
Sitting jumbo jet
Speeding motorcycle
14
The net force required to keep a 5kg object moving rightward with a constant speed of 2 m/s
3N
0N
10N
2.5N
15
What does equilibrium mean?
When the acceleration is zero.
Answers blue and red.
When it is not moving.
When the sum of the forces is zero.
16
Identify the action/reaction pair.
You push on a box and the box pushes on you.
You push on a box and gravity pushes on the box.
You push on a box and the box moves.
You push on a box and it accelerates.
17
What statement about inertia is true?
A more massive object has more inertia than a less massive
Inertia is a force
Fast objects have more inertia than slow ones
Inertia makes objects slow down
18
T or F: Vectors have a magnitude and direction.
True
False
19
Inertia is...
A resistance to a change in motion
Ability to continue doing what it has been doing.
Manifestation of mass.
All of the above.
20
If a person in a rolling chair pushes on a wall with their feet, and they roll backward...
all of the above are true
person stayed at rest until an outside F applied (N's 1st)
person experienced a force and accelerated (Newton's 2nd)
the wall pushed back on the person (Newton's 3rd)
21
An object accelerating at 4 m/s
2
has its force increased by a factor of 3. What's the new accel
12 m/s2
4/3 m/s2
3/4 m/s2
7 m/s2
22
T or F: An object is at equilibrium when it is has constant acceleration.
False
True
23
A 12 N net force is applied to a 3 kg object. a = ?
15 m/s2
9 m/s2
4 m/s2
1/4 m/s2
24
The four field forces in order from strongest to weakest are.. (can you remember? :D ) (no pts)
strong, weak, electromagnetic, gravity
strong, electromagnetic, weak, gravity
gravity, strong, weak, electromagnetic
gravity, electromagnetic, strong, weak
25
A net force of 15 N is exerted on a book to cause it to accelerate at a rate of 5 m/s
2
. m = ?
75 kg
3 kg
1/3 kg
20 kg
26
Which is true about Newton's 2nd law of motion?
An object accelerates right,net force must be right.
Acceleration is only dependent on the force.
A 2kg object goes from 0 to 6m/s in 3 s. Net force is 12 N.
Accelerating objects must be speeding up.
