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First Quarter Science 8 Review Quiz Flashcards | StudBud
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First Quarter Science 8 Review Quiz
First Quarter Science 8 Review Quiz
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1
A 45 N girl sits on a 8 N bench. How much work is done on the bench?
720 Joules
360 Joules
I don't know
0 Joules
2
As mass increases ,acceleration _________
Decreases
Doubles
Remains constant
Increases
3
Hina uses 63W in 10 minutes. How much work did she do?
37,800J
3800J
630J
37000J
4
Which law does this relate to?
Newton's First Law
Newton's Second Law
Newton's Third Law
5
A soccer ball is stationary in a field and someone kicks the ball. What law is being demonstrated?
Third law
4th law
2nd law
1st law
6
Newton's First Law states that .....
Objects never move.
Inertia is a main force.
For every action there is an equal and opposite reaction.
Objects at rest or in motion only change if there's unbalanced force.
7
What are the 4 fundamental forces?
Interaction, strong electromagnetism, weak gravity.
Weak & strong nuclear, electromagnetism, gravity.
Weak interaction, strong magnetism, gravity.
Weak & strong electromagnetism, weak & strong gravity.
8
Force and Acceleration have a ___________ relationship.
Inverse
Direct
Romantic
9
What is Newton's First Law
Law of Inertia
Law of Motion
Law of Running
Law of Force
10
Forces can....
Change the direction of moving object
Accelerate or stop the movement of objects
All of above
Change the state of objects
11
A 100N of force is used to push a box 7m. How much work was done?
4200 J
14.29 J
700 J
294 J
12
Newton's Three Laws
Motion,Inertia, and Interaction
Inertia, Acceleration, and Interaction
None of the above
Push,Pull,and Hold
13
According to Newtons law how long will an object stay at rest
until an unbalanced force acts on it
until someone waks by
as long as there is an unbalanced force is actiong on it
it can't rest
14
if you use the same force to push a truck and push a car which one will have more acceleration and why?
the car
the truck because it has more mass
the truck
the car because it has less mass
15
Constant acceleration due to gravity(g) on earth
14 m/s2
2.3 m/s2
9.8 m/s
9.8 m/s2
16
Do rough surfaces produce more friction?
Yes
No
17
How much does a 5.0 kg object weigh?
49 lbs.
5.0 lbs.
5.0 kg
49 N
18
What is the correct formula for finding Acceleration
Acceleration=Mass x Force
None of the above
Acceleration=Force/Mass
Acceleration=Mass/Force
19
How much power did he expend in pushing the cart (see picture) if it takes him 4 seconds?
100 W
4W
400 W
40 W
20
In which situation did I do work?
I pushed on the door as hard as I could, but it didn't open
I pulled my bag of groceries out of the car
I watched a car drive by
I pushed a wall
21
What is the unit of work done?
N
M
W
J
22
What is the mass of an object if it takes a Force of 100 N to accelerate it 2 m/s
2
?
2 kg
200 kg
50 kg
5 kg
23
Which law does this relate to?
Newton's First Law
Newton's Third Law
Newton's Second Law
24
Which of Newton's laws describes INERTIA (objects at rest will remain at rest...)?
2
4
3
1
25
Nuclei are held together by the strongest of the four fundamental forces of physics, _____
the weak nuclear force
the strong nuclear force
the electromagnetic force
the gravitational force
26
a cat's mass is 5kg and its acceleration is 5m/s
2
, what is its force?
2.5N
25N
1N
10N
27
How much work is done moving the blue box across the floor?
0J
10J
250J
125J
28
Newton's second law can be shown with this equation:
Anger = Mr. Grooms X Fire ( A = M x F )
Force = Mass X Acceleration(F = M x A )
Mass = Force / Newtons ( M = F/N )
Force = Acceleration x Weight ( F = A x W )
29
If there is 20N of friction how much force is needed to keep the sofa motionless?
75N
50N
20N
ON
30
How much work is done by gravity when an 800 N person travels 10 m up the stairs?
-8000 J
800 J
-800 J
8000 J
31
If the object is moving on a frictionless surface, what is it's acceleration?
0.3 m/s2
15 m/s2
3 m/s2
32
Which of Newton's laws describes the resultant force on the bag as proportional to the punch?
1st Law
3rd Law
2nd Law
33
Friction creates heat
True
False
34
Power is...
the same as work
the same as force
the rate at which work is done.
measured in Newtons
35
Work done
mass x distance
mass / distance
force x distance
force / distance
36
Which law applies to the reason needing to wear a seat belt?
Newton's 1st Law
Newton's 2nd Law
iDontKnow
Newton's 3rd Law
37
Newton's Third Law states that....
For every action, there is a larger reaction.
For every action, there is a smaller reaction.
Every action is caused by force.
For every action, there is an equal and opposite reaction.
38
If the mass of an object is 60kg, what is its approximate weight?
588 N
600 kg
60 kg
6 N
39
If Mass = 10 kilograms and Acceleration = 3 m/s
2
, what is the force?
30
30 Newtons
3.33 Newtons
300 Newtons
40
Force causes acceleration
False
True
41
What is friction?
opposing force of motion
gravity
a type of motion
not a force
42
How much power is required to perform 4000 J of work in 10 seconds?
4000 Joules
400 Watts
4000 Newtons
4000 Watts
43
This is a picture of Newton's...
First Law
Third Law
All 3 Laws
Second Law
44
How much POWER is expended if you lift a 50-N rock 10 meters in 2 seconds?
5 Watts
500 Watts
1,000 Watts
250 Watts
45
A 900N mountain climber scales a 100m cliff. How much work is done by the mountain climber?
90,000N
9,000J
900J
90,000J
46
what is mass?
the measure of how much matter in an object
for every action there is an opposite and equal reaction
the sum of all forces acting on an object
the act of changing location from one place to another
47
Mass causes acceleration
True
False
48
How much force is needed to push a 5kg box at a rate of 4m/s
2
?
9N
20N
1.25N
1N
49
If both Timmy and John push a giant metal box and it begins to accelerate, this is an example of Newton's third law.
True
False
50
Newton's second law states that...
Acceleration depends on the mass and forces acting on an object
Acceleration causes an object to speed up
An object will remain at rest unless acted upon by another force
For every action, there is an equal and opposite reaction
51
An object accelerates 12m/s
2
when a force of 6 N is applied to it. What is the mass of the object?
0.5kg
mass does not define me
0.35kg
2kg
52
Which type of friction is the strongest?
Fluid
Static
Rolling
Kinetic
53
What is the mass of an object with a weight of 500N?
5000kg
Not enough information.
500kg
51kg
54
What is Newton's Second Law
None of the above
Law of Inertia
Law of Interaction
Law of Acceleration
55
What is the mass of a furnace if you are pusing it with 56N and acceleration of 7m/s
2
?
69Kg
392Kg
none of these
8Kg
56
How much force is required to accelerate a 2000 kg car at 3 m/s?
2000N
8000N
6000N
4000N
57
Force, mass and acceleration are all related
False
True
58
a dogs mass is 20kg and its acceleration is 3m/s
2
, what is its force?
.15N
6.666666N
30N
60N
59
Which of Newton's law explains why the boat will move backwards when the man jumps off?
3rd Law
1st Law
2nd Law
60
Which of Newton's Laws is being demonstrated in the picture?
3rd Law
2nd Law
Law of Inertia
1st Law
