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Chapter 3 Review Flashcards | StudBud
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Chapter 3 Review
Chapter 3 Review
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Section 3.1 - 3.2
Flashcards
39 cards
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Practice quiz
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Questions
39
Answers
1
When an elastic collision occurs
objects bounce off each other
There's no loss in the total kinetic energy
Nothing happens
They stick together
2
Potential energy is energy due
to gravity
to motion
to mass
to position
3
Action and reaction forces do not cancel.
True
False
4
For every action force, there is a reaction force equal in strength and opposite in direction.
Newton's 3rd Law
Newton's 2nd Law
Newton's 1st Law
I don't know
5
The kinetic energy of a moving object is equal
to one half its mass multiplied by the square of its momentum
to one half its mass multiplied by the square of its gravity
to one half its mass multiplied by the square of its height
to one half its mass multiplied by the square of its speed
6
Force changes momentum
False
True
7
The momentum of a moving object is
its mass multiplied by its velocity
its force multiplied by its velocity
its mass multiplied by its weight
its weight multiplied by its velocity
8
Momentum does not change when velocity changes
False
True
9
Without energy, nothing could ever change
False
True
10
In Newton's 3rd law, forces always come in pairs.
False
True
11
The words action and reaction are just labels. It does not matter which force is called action and which is reaction.
True
False
12
Bouncing results in a greater change in momentum and therefore almost always creates a greater force.
False
True
13
An object that has no energy is able to do work
False
True
14
A change in momentum created by a force exerted over time is called
impulse
acceleration
impluse
gravity
15
A rubber ball and a clay ball are dropped on a gymnasium floor
The rubber ball has an elastic collision and bounces back up
The clay ball has an elastic collision
The rubber ball has an inelastic collision and bounces back up
The clay ball has an inelastic collision.
16
Kinetic energy depends on mass and speed
False
True
17
Imagine a skateboard contest between Newton and an elephant.
Newton is the fastest
The elephant is the fastest
Newton is the slowest
Newton accelerates more
18
Action and reaction forces:
Always act in opposite directions
Cannot cause acceleration
Always act on different object.
Always have the exact same strength
19
An object in motion stays in motion.
I don't know
Newton's 2nd Law
Newton's 1st Law
Newton's 3rd Law
20
The units of N·sec and kg·m/sec are the same units
True
False
21
The equation for Ep is
Ep=Fh
Ep=mh
Ep=1/2mv2
Ep=mgh
22
In physics, work is done on objects
False
True
23
Like force, momentum measures a moving object’s resistance to changes in its motion.
True
False
24
In an inelastic collision, objects change shape or stick together.
True
False
25
Work is
distance
applying a force over a distance
the transfer of energy
a joule
26
The symbol for momentum is
N
m
p
kg
27
As long as there are no outside forces (such as friction), momentum is conserved in only elastic collisions
True
False
28
The units for momentum are
grams·meters per second
Newton·meters per second
kilogram·meters per second
kilometers·meters per second
29
Energy can never be created or destroyed, just converted from one form into another
Law of conservation of mass
Law of conservation of momentum
Law of conservation of matter
Law of conservation of energy
30
Energy in motion is called
kinetic energy
chemical energy
nuclear energy
potential energy
31
The first and second laws of motion apply to single objects.
True
False
32
The forces do not cancel because they act on different objects.
False
True
33
In an inelastic collision, the total kinetic energy of the system increases.
True
False
34
A change in an object’s momentum depends on the
net force
friction
amount of time force is applied
mass
35
Forces outside of a system can change the total momentum of the system
False
True
36
Force does not change momentum
False
True
37
The unit of measurement for energy
is the Newton -meter (N*m)
is the Newton (N)
is the joule (J)
is the kilogram (kg)
38
Examples of energy include
a piece of wood in a fireplace
a rock
a gust of wind
a ball at the top of a hill
39
Because of the third law, the total momentum of two interacting objects changes
False
True
