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Physics Unit 2.3 -Forces, History of Forces, Newton's Laws Flashcards | StudBud
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Physics Unit 2.3 -Forces, History of Forces, Newton's Laws
Physics Unit 2.3 -Forces, History of Forces, Newton's Laws
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1
What is the NET force acting on the box ?
40 N, right
40 N, left
60 N, right
60 N, left
2
A 40.0 N force is applied to a 0.1 kg object on a frictionless surface. What would be its acceleration ?
4000 m/s/s
400 m/s/s
40.1 m/s/s
39 m/s/s
3
The metric unit for force :
kg
lb
g
N
4
Two types of forces are some type of push or pull
False
True
5
The Net force acting on an object would determine any _____________ of the object.
density
motion
mass
conductivity
6
This Newton's law of motion states that pairs of action-reacton forces are equal in magnitude but opposite in direction
3rd
1st
universal gravitation
2nd
7
Newton's 2nd law of Motion deals with relationships between force, mass, and, acceleration.
False
True
8
This law of motion deals with the force of inertia
1st
3rd
gravitation
2nd
9
Inertia is a force that is resistance to change. True/False - 1 point
False
True
10
The discovery of which phenomenon provided evidence for the existence of weak nuclear forces :
radioactive beta decay
electromagnetism
fission
gravity
11
This law of motion explains that acceleration is directly proportional to force but inversely proportional to mass.
gravitation
3rd
2nd
1st
12
An object has a weight of 500 N rests on the floor. What Normal force would the floor exert back on the object ?
500 N, down
500 N, up
0.0 N ,up
250 N, down
13
Weight is actually a force and is measured in units called:
lb
N
s
kg
14
What is the acceleration of the box :
5 m/s/s
1 m/s/s
2 m/s/s
3 m/s/s
15
Hans Christian Orsted discovered a direct relationship between electricity and magnetism when he
invented a tesla coil
turned on a light bulb
turned on a radio
observed a compass needle move near an electric current
16
What would occur without the existence of the strong nuclear force ?
neutrons would become protons
protons in the nucleus of an atom would repel each other
atoms would NOT behave like large scale matter
electrons would NOT fly out of their orbits
17
The scientist named Maxwell provided mathematical proof that :
magnets can not produce electricity
magnets repel electricity
electric currents produce magnetic fields
electric currents repel magnetic fiels
18
A vector sum of all applied and frictional forces acting on an object
strong
weak force
Net
gravity
19
What is the NET force acting on the box pictured ?
25 N, right
11 N, left
25 N, left
11 N, right
20
According to Galileo : if a round object were set in motion on a flat frictionless surface, it would
stop in 5 sec
accelerate
continue to roll in a straight line forever
levitate
21
Forces occur/exist in pairs.
False
True
22
Einstein's general relativity explained the :
gravitational force
strong force
electromagnetic force
weak force
23
General relativity explains _______________ forces.
weak force
strong force
electromagnetism
gravity
24
Would this crate be moving ?
yes
no
25
Two students are playing tug-of war. One pulls to the left with a force of 300 N. The other to the right 280 N. Net F=
580 N, right
20 N, right
580 N, left
20 N, left
26
_______________ is a force of resistance between two substances that come into contact with each other.
inertia
friction
torque
gravity