Newton
Newtons 1st law- The law of inertia states that....
an object will stay in motion with a constant velocity or will stay at rest until it is acted upon by outside forces.
A push or pull exerted on an object in an effort to change that object's velocity
FORCE
If you put two magnets together with the same charged end facing one another what will occur?
They will repeal. Positive to Positive repels. Negative to Negative repels.
Which 2 represents velocity?
a. 50 miles per hour
b. 20 feet per second north
c. 16.2 meters
d. 20 miles per hour west
B. 20 feet per second north
D. 20 miles per hour west
What is the study of motion in physics called?
Mechanics
2 people are riding in a car and wave to a friend on the street as they drive by. From the car passenger's point of view, is the driver moving? From the friend's point of view, is the driver moving?
The driver is not moving to the passenger.
The friend sees the driver as moving.
A device that either Multiplies or redirects a force
SIMPLE MACHINE
What is an example of a first-class lever?
See-saw
Fulcrum is located in the middle of the resistance and effort.
Which represents a velocity
a. 25 meters
b. 50 feet
c. 20 kilometers per hour west
d. 15 miles per hour
c. 20 kilometers per hour west
An object ___________ (accelerating, in motion) will stay that way until it is acted upon by an outside force.
in motion
Newton's Second Law- Force states that....
when an object is acted on by one or more outside forces, the total force is equal to the mass of the object times the resulting acceleration.
F = m x a
Force = Mass x Acceleration
The rate at which an object moves
SPEED
What is a second-class lever?
a wheelbarrow
fulcrum is at one end of the bar and resistance is between the effort and fulcrum
Which unit is NOT a possible unit for speed?
a. feet per mile
b. miles per hour
c. kilometers per second
d. inches per day
a. feet per mile
(Distance dv. distance) NOT CORRECT
(Distance dv. time) CORRECT
For every ___________ (force, action) there is an equal and __________ (stronger, opposite) reaction.
action
opposite
Which 2 of the following refer to a decrease in an object's velocity?
a. negative acceleration
b. acceleration
c. deceleration
a. negative acceleration
c. deceleration
The speed of an object in a given direction
VELOCITY
Increasing
Which of the following is a translucent material?
a. shoe
b. car windshield
c. black construction paper
d. lampshade
d. Lampshade
When an object is acted on by one or more outside forces, the total force is equal to the __________ (speed, mass) of the object times the resulting acceleration.
mass
Newton's Third Law states that...
for every action, there is an equal and opposite reaction.
Ie. 2 people on roller skates, one pushes the other.
A closed path through which electric current flows
The high spots on waves are called _________.
The low spots on waves are called _________.
crests
trough
Which of the following items is opaque?
a. clear drinking glass
b. waxed paper
c. lampshade
d. winter jacket
d. winter jacket
(does not allow light to pass through it)
When you see a red shirt, what colors of light are being absorbed and what colors are reflected?
Red light is being reflected because that is the color that reaches our eyes from the shirt.
The rest of the colors that make up white light (orange, yellow, green, blue, indigo, and violet) are being absorbed by the shirt.