Physics Test Review Test Tuesday. Newton’s 1 st Law of Motion 1. An object at rest will remain at...
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Transcript of Physics Test Review Test Tuesday. Newton’s 1 st Law of Motion 1. An object at rest will remain at...
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Physics Test Review
Test Tuesday
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Newton’s 1st Law of Motion
1. An object at rest will remain at rest, and an object in motion will remain in motion until acted upon by an .
2. Also known as .
Unbalanced ForceInertia
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Newton’s 2nd Law of Motion
2. Force = × mass acceleration
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Newton’s 3rd Law of Motion
Every action has an and reaction.
equalopposite
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Forces
Forces act on matter to change its position and create .
Any or is a force.Unit of force = . is a force which will slow down
or stop an object. force pulls everything to
the center of the Earth.
motionpush pull
NewtonFriction
Gravitational
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Forces
Weight is measured on a .Mass is measured on a .Where would you weigh the least
amount?– Moon
– Earth
balancescale
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Forces
An object falls due to .Gravity will cause the mass of a falling
object to .If dropped, which would hit the ground
first?– Bowling ball– Baseball
gravity
accelerate
Both would hit at the same time.
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Forces
Force = × mass acceleration
M A
F
Force is measured in Newtons.
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Force = Mass × Acceleration
Acceleration is the rate of change in an object’s velocity.
Object speeds up = Object slows down = Unit for acceleration = .
acceleration
deceleration
m/s²
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Speed
Speed = / distance time
S T
DSpeed is measured in m/s.
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Work
Work = × Force distance
F d
WWork is measured in Joules.
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Practice Problems
If sound travels at a speed of 330 m/s, how long would it take you to hear thunder 1,750 meters away?
330 m/s1,750
metersWhat information do you know?
Speed = 330 m/sDistance = 1,750 meters
Which equation should you use?Speed= Distance / Time
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Practice Problems
If a force of 3000 N can move a crate at an acceleration of 1.5 m/s2, what is the mass of the object?
3000 N
1.5 m/s²
What information do you know?Force = 3000 NAcceleration = 1.5 m/s²
Which equation should you use?Force= Mass × Acceleration
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Practice Problems
How much work does an elephant do while moving a circus wagon 20 meters will a pulling force of 200 N?
20 meters200 N
What information do you know?
Force = 200 NDistance = 200 N
Which equation should you use?Work= Force × Distance
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Pace for One Runner
0
5
10
15
20
25
30
35
40
45
1 2 3 4 5
Time (seconds)
Dis
tan
ce (
yard
s)
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Distance-Time Graphs
Where was the runner at rest?
Where was the runner’s speed the fastest?
0-1 seconds, 3-4 seconds
1-2 seconds
Pace for One Runner
0
5
1015
20
25
3035
40
45
1 2 3 4 5
Time (seconds)
Dis
tan
ce (
yard
s)
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Height of Ramp
Length of Ramp
Mass of Marble
Average Distance
Marble Rolled
2 cm 88 cm 1g 188 cm
4 cm 88 cm 1g 376 cm
8 cm 88 cm 1g 752 cm
16 cm 88 cm 1g 1504 cm
What a blast lab data chart
What would be the initial problem for this investigation?
At which point would the marble have potential energy?
What would the independent variable be in this investigation?
What would the dependent variable be in this investigation?
What would the control variables be in this investigation?
How will the height of the ramp affect how far the marble will roll?
At the top of the ramp
Ramp height
Distance marble rolledLength of ramp, mass of marble
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Newton’s Laws of Motion
You hit the cue ball into eight ball to win a pool game.
Professional baseball players use wooden bats with more mass than aluminum bats with less mass.
Exploding fuel in a rocket ship propels the rocket into space.
It is easier to push a car in neutral than a bus in neutral.
1st Law of Motion
2nd Law of Motion
2nd Law of Motion
3rd Law of Motion
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Practice Problems
Amanda, a student in science class, walked backwards with an average speed of 3 m/s. If she completed her walk in 15 seconds, what was the total distance she traveled in meters?
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Practice Problems
You are moving a dresser that has a mass of 36 kg. Its acceleration is 0.5 m/s2. What is the force being applied?
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Practice Problems
You drive a total of 600 km in 12 hours. On average, how fast were you driving?
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Practice Problems
If 450 J of work is done to push a toy truck up the driveway 15 meters, how much force are you applying to the toy truck?