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Physics - Unit 2 (Newton's 1st and 2nd Law) Flashcards | StudBud
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Physics - Unit 2 (Newton's 1st and 2nd Law)
Physics - Unit 2 (Newton's 1st and 2nd Law)
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Quiz on Newton's Laws and forces #physics #newtonslaws
Flashcards
25 cards
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Questions
25
Answers
1
The more inertia that an object has, the more mass that it has.
True
False
2
Force transmitted through a string, wire, rope, and or cable when objects are at both ends
Tension
Spring
Normal
Applied
3
An object persists in uniform motion in a straight line unless disturbed by an unbalanced force
Newton's 2nd
Newton's 1st
Newton's 3rd
4
There must be an unbalanced force in order to keep an object in motion.
True
False
5
A 72-kg skydiver feels an F
air
of 540 N at one particular moment. What is his acceleration?
The skydiver has reached terminal velocity
75 m/s2
2.3 m/s2
9.8 m/s2
6
Which object has no net force acting on it?
a ball falling freely toward the surface of Earth
a projectile climbing to its highest point in its trajectory
a satellite orbiting Earth in a circular orbit
a bus moving forward with a constant speed
7
Calculate the net force of a 21 kg football player running at a rate of 3 m/s²
7 m/s
63 N
7 N
63 m/s
8
Fast moving objects have more inertia than slow moving objects.
False
True
9
A force is described as _________ or _________ that acts on an object.
a push or a pull
normal or applied
gravity or friction
tension or weight
10
If the sum of all the forces acting on a moving object is zero, the object will
change the direction of its motion
accelerate uniformly
slow down and stop
continue moving with constant velocity
11
1 Newton = 1 kg • m/s
True
False
12
30 N South + 50 N North =
20 N South
20 N North
80 N North
80 N South
13
The resistance of an object to a change in its state of motion.
Friction
Acceleration
Inertia
Force
14
An object is pushed at a constant velocity by a 8 N force. How much friction must be present?
Exactly 8 N
More than 8 N
Less than 8 N
15
The sum of all forces acting upon an object is known as:
normal force
applied force
frictional force
net force
16
In a weightless environment, would it require a force to set an object in motion?
No
Yes
17
The normal force is always equal to the weight of an object.
True
False
18
A falling object is slowing down. Which of the following is true?
The acceleration is down
The acceleration is up
The object is at terminal velocity
The weight is equal to air resistance
19
An object moving rightward must have a rightward force acting on it.
True
False
20
Force that opposes motion between two surfaces
Normal
Friction
Tension
Applied
21
Force equals mass times acceleration. F=m*a
Newton's 2nd
Newton's 1st
Newton's 3rd
22
The result of unbalanced forces
rest
constant velocity
acceleration
23
Which object has the greatest inertia?
10 kg object moving at a speed of 3.0m/s
20 kg object at rest
5 kg object moving at a speed of 5.0m/s
15 kg object moving at a speed of 1.0m/s
24
What is the acceleration of a 6 kg object with a 42 N net force acting on it?
8 m/s2
252 m/s2
7 m/s2
Not enough information
25
If an object is accelerating to the right, then the net force must also be to the right.
False
True
