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Forces and Newton's 1st and 2nd Laws
Forces and Newton's 1st and 2nd Laws
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Quiz on Newton's Laws and forces #physics #newtonslaws
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34 cards
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Answers
1
Which situation describes an object that has no unbalanced force acting on it?
a hockey puck moving at constant velocity across ice
an apple in free fall
a laboratory cart moving down a friction less 30.°incline
a satellite orbiting Earth
2
Calculate the net force acting on a 21 kg football player accelerating at a rate of 3 m/s²
7 N
63 N
7 m/s
63 m/s
3
Force exerted by a surface as an object moves across it.
Normal
Sliding Friction
Applied
Air Resistance
4
A force is described as _________ or _________ that acts on an object.
gravity or friction
push or pull
5
The resistance an object to a change in its state of motion.
Friction
Newton's 3rd
Inertia
6
1 Newton = 1 kg • m/s2
False
True
7
The result of unbalanced forces
rest
acceleration
constant velocity
8
What is the acceleration of an object with a 42 Newton force that has a mass of a 6 kg?
252 m/s/s
7 N
7m/s/s
9
Which object has the greatest inertia?
a 20.-kg object at rest
a 5.0-kg object moving at a speed of 5.0m/s
a 15-kg object moving at a speed of 1.0m/s
a 10.-kg object moving at a speed of 3.0m/s
10
Which body is in equilibrium?
a bus moving with a constant speed
) a satellite orbiting Earth in a circular orbit
a ball falling freely toward the surface of Earth
a projectile climbing to its highest point in its trajectory
11
Forces exist as a result of an interaction between two objects.
True
False
12
Calculate the mass of an object moving with a 20N net force, and an acceleration of 5m/s/s.
100kg
100N
4N
4kg
13
20 N, right+ 20 N, right =
0 N
40 N, right
-40 N, right
14
10 N East + 10 N West =
20 N East
0 N
20 N West
15
Force transmitted through a string, wire, rope, and or cable when objects are at both ends
Applied
Tension
Normal
Spring
16
If the sum of all the forces acting on a moving object is zero, the object will
accelerate uniformly
slow down and stop
continue moving with constant velocity
change the direction of its motion
17
Force created when a large object (like a planet) attracts another towards it.
Tension
Gravity
Applied
Normal
18
The sum of all forces acting upon an object is known as:
gross force
kinetic force
static force
net force
19
Force is a quantity that is measured using the standard metric unit known as
Newton
Kilogram
gram
20
What is the unit for acceleration?
N
m/s
Depends on Speed
m/s/s
21
The more mass that an object has, the more inertiathat it has.
True
False
22
Support force that is in contact with another stable object
Normal
Applied
Spring
Tension
23
If the mass of an object is decreased, its inertia
Remains in motion
Increases
Decreases
24
30 N South + 50 N North =
80 N North
20 N North
80 N South
25
Force applied to an object by another object or person
Tension
Normal
Applied
Spring
26
When all the forces acting upon an object balance, this is referred to as
Equilibrium
Force
Unbalanced Force
27
Frictional force which acts on objects travelling through air.
Air Resistance
Applied
Kinetic Friction
Normal
28
Force that opposes motion between two surfaces
Friction
Force
Newton's 1st
29
Force equals mass times acceleration. F=m*a
Newton's 1st
Newton's 2nd
Newton's 3rd
30
Diagram used to visualize the magnitude and direction of all forces acting upon an object.
Motion
Free Body
Picture
Venn
31
An object persists in uniform motion in a straight line unless disturbed by an unbalanced force
Newton's 3rd
Newton's 2nd
Newton's 1st
32
Exerted by a spring when objects are connected to both ends
Normal
Spring
Applied
Tension
33
Force is not a vector quantity.
False
True
34
In a weightless environment, would it require a force to set an object in motion?
No
Yes
