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Newton´s Laws
Newton´s Laws
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A #physics review for Newton´s Laws. #science
Flashcards
31 cards
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Questions
31
Answers
1
Which is an example of Newton's third law?
Fnet=ma
Fg=mg
Galileo's thought experiment
swimming
2
If a block is in equilibrium, the magnitude of the block acceleration is
increasing
decreasing
zero
constant, but not zero
3
What are the units for gravitational acceleration?
kg
m/s
N
m/s2
4
Which of the four types of forces is the weakest?
strong nuclear forces
electromagnetic
gravitational
weak forces
5
F=force of magnitude on ball. If the bat's mass=3x the ball's, the mag of the ball's force is
F
F/3
3F
2F
6
What is Newton's second law?
acceleration is constant
for every action, there is an opposite and equal reaction
an object in motion stays in motion unless acted on-ubforce
acceleration of an object is dependent on its fnet and kg
7
A 750-newton person stands in an elevator that is accelerating downward. The up force must be
greater than 150 N
less than 750 N
equal to 150 N
equal to 0 N
8
What is the unit for weight?
N
kg
m/s2
m/s
9
Does it matter how fast the object is moving to find the force?
yes
so
no
maybe
10
What are the unit(s) for Mass?
m/s2
kg
m/s
N
11
If a block is in equilibrium, the magnitude of the block's acceleration is
decreasing
zero
increasing
constant, but not zero
12
What is Newton's first law?
acceleration of an object is dependent on its fnet and kg
an object in motion stays in motion unless acted on-ubforce
acceleration is constant
for every action, there is an opposite and equal reaction
13
A box is pushed to the right, across a classroom floor. The Foff on the box is moving to the
floor
left
right
ceiling
14
Is weight a force?
no
yes
so
maybe
15
Perpendicular Component=
Fgcos
Fgsin
Fg=d/t
Fgtan
16
What is the Newton's third law?
acceleration of an object is dependent on its fnet and kg
for every action, there is an opposite and equal reaction
acceleration is constant
an object in motion stays in motion unless acted on-ubforce
17
Does the law of inertia pertain to moving objects, objects at rest, both or neither?
objects at rest
objects
neither
both
18
When the sum of all the forces acting on a block on an inclined plane is zero, the block
must be at rest
must be accelerating
may be slowing down
may be moving at constant speed
19
2x mass=
the same amount for inertia
2x inertia
3x inertia
4x inertia
20
As the angle between vectors decreases, the resultant
decreases
remains the same
vanishes
increases
21
If mass doubles, then inertia
remains the same
is half as much
decreases
doubles
22
Is mass a force?
yes
maybe
so
no
23
Who is the best physics teacher?
Wetzel
Wetzel
Wetzel
Wetzel
24
What is the weight of a 2.00-kilogram object on the surface of Earth?
9.81 N
4.91 N
19.6 N
19.6 N
25
Compared to the force used to start sliding a crate across a floor, the force to keep sliding
is greater
is less
constant
is the same
26
Parallel Component=
Fgcos
Fgtan
Fg=d/t
Fgsin
27
A 10 N force is applied to a 5kg box. What is the acceleration?
15m/s2
30m/s2
50m/s2
2 m/s2
28
All roads to lead to
fnet=a=g
a2+b2=c2
fnet=ma
v=d/t
29
Friction is the force that ___ the motion between two surfaces that are in contact.
ignores
opposes
keeps
supports
30
If you hit a wall with a force of 200 N, how much force is exerted on you?
200 N
100 N
400 N
300 N
31
Compared to your mass on the moon, your weight on the moon is
greater
less
the same
not enough information given
