
Physics Unit Assessment Review
Presentation
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Science
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6th - 8th Grade
•
Practice Problem
•
Easy
+1
Standards-aligned
Jon Bullock
Used 8+ times
FREE Resource
7 Slides • 15 Questions
1
Physics Unit Assessment Review
Use this help you study/practice for the Unit Assessment
2
Multiple Choice
A race car traveled 6000 meters (6 Km) in 60 seconds. What is the car's speed?
100 m/sec
3.14 m/sec
1 Km/sec
20 Km/sec
3
Calculating Speed
Speed = distance/time
Or s=d/t
This formula will be given on the assessment
4
Multiple Choice
Newton’s first law of motion states that, unless acted on by an __________ force, an object at rest stays at rest and an object in motion stays in motion at a constant velocity.
balanced
unbalanced
equal
none of the answers are correct
5
Multiple Select
Newton's first law of motion is also called the law of ___________
physics
velocity
speed
inertia
6
Multiple Choice
Newton’s first law of motion states that, unless acted on by an unbalanced force, an object at rest stays at ________ and an object in motion stays in motion at a constant velocity.
motion
acceleration
rest
a constant speed
7
Multiple Choice
Newton’s first law of motion states that, unless acted on by an unbalanced force, an object at rest stays at rest and an object in motion stays in ___________ at a constant velocity.
motion
rest
acceleration
stopping motion
8
Newton's 1st law of Motion
Newton’s first law of motion states that, unless acted on by an unbalanced force, an object at rest stays at rest and an object in motion stays in motion at a constant velocity.
This law is also called the Law of Inertia
9
Multiple Choice
In the diagram above, the block will move [direction] (up/down/left/right) with the force of [number] Newtons.
Up, 7
left, 2
right, -4
down, 3
10
Multiple Select
In the picture, the forces acting on the box are
balanced
unbalanced
11
Force Diagrams (Free - Body Diagram)
First, look at the direction of the forces
2nd, look at the forces on either side of the box
2 N right and 2 left
These forces are in opposite directions - so we subtract them
2 N - 2N = 0 N (Balanced force)
12
Forces cont.
Now, look at the up and down forces
2N Up, and 5 N down (5 is the higher number - Box will move down)
They are in opposite directions so SUBTRACT! 😀
5 N - 2N = 3N Unbalanced(Doesn't equal 0)
13
Multiple Choice
Newton’s second law of motion says that the acceleration of an object depends on the ____________ of the object and the amount of force applied.
mass
force
weight
acceleration
14
Multiple Choice
Newton’s second law of motion says that the acceleration of an object depends on the mass of the object and the amount of ____________ applied.
mass
force
acceleration
15
Multiple Choice
If a cart with a mass of 15 kg accelerates at 3 meters per second squared, how many Newtons of force will it have?
60 N
45 N
30 N
5 N
16
Multiple Choice
Engineers want a racecar to have as ___________ mass as possible. A car with less mass requires less force to accelerate at the same rate as a car with more mass. So if two cars have the same engine, the car with less mass can accelerate more quickly than the car with more mass.
little
much
17
Multiple Choice
Engineers want a racecar to have as little mass as possible. A car with less mass requires ______force to accelerate at the same rate as a car with more mass. So if two cars have the same engine, the car with less mass can accelerate more quickly than the car with more mass.
less
more
18
Multiple Choice
Engineers want a racecar to have as little mass as possible. A car with less mass requires less force to accelerate at the same rate as a car with more mass. So if two cars have the same engine, the car with less mass can accelerate ________ quickly than the car with more mass.
less
more
19
Newton's 2nd law of Motion
The law states that Force = Mass x acceleration or F=m x a
So, the Newton’s second law of motion says that the acceleration of an object depends on the mass of the object and the amount of force applied.
The smaller the mass of an object, the less force is needed to make the object speed up or slow down (accelerate)
20
Multiple Choice
Newton's Third Law states that when one object applies a force to a second object, the second object applies an _________ and _______________force to the first object.
equal, opposite
smaller, weaker
larger, stronger
unequal, in the same direction
21
Multiple Choice
Ouch! Suppose you bumped your 2 kg hand against the edge of a table with a force of 8 Newtons. Your hand hurts because according to Newton’s third law of motion, the table exerts an equal and opposite force on your hand. The force of _______ exerted by the ________ causes your hand to hurt.
2N, floor
6 N, cat
8 N, table
0 N, table
22
Newton's 3rd law of Motion
"Every action has an equal and opposite reaction"
If push on the floor with a force of 16 N, the floor pushes back with force of 16 N.
Physics Unit Assessment Review
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