Vocabulary
The state in which one objects distance from another is changing
Motion
The formula for speed is _________________________.
Distance / Time
Nicolas Copernicus
Formulated the model of the universe with the sun at the center
Newtons 1st Law
An object at rest stays at rest and an object in motion stays in motion unless acted upon
Overall forces acting on an object
Net Force
Equal forces acting on an object in opposite directions
Balanced Forces
What is the difference between the velocity and the speed of an object?
A.Velocity is the change in distance over time, while speed is the change in velocity over time.
B.Velocity has a direction associated with it, while speed has no specific direction.
C.Velocity has no direction associated with it, while speed has a specific direction.
D.Velocity is the change in speed over time, while speed is the change in
distance over time.
B.Velocity has a direction associated with it, while speed has no specific
direction.
Albert Einstein
Developed the theory of quantum mechanics
Newtons 2nd Law
F = ma, or force is equal to mass times acceleration.
To find the net force of two objects moving in opposite directions you would _____________________their forces.
Subtract
The speed of an object in a particular direction
Velocity
Which scenario best represents Newton’s third law?
A. Two football linemen pushing against each other do not move.
B. A wheelbarrow filled with heavy rocks is harder to move than one filled with grass.
C. A car passenger’s body moves forward when the driver applies the brakes.
A. Two football linemen pushing against each other do not move.
Issac Newton
Key figure in the philosophical revolution known as the enlightenment
Newtons 3rd Law
For every action (force) in nature there is an equal and opposite reaction.
50N --> ☐ 20N -->
70N
stored energy
Potential energy
On a distance time graph, acceleration would be shown as a ____________.
A. straight diagonal line
B. horizontal line
C. curved line
D. vertical line
Curved Line
Ernest Rutherford
Discovered alpha and beta rays, structure of the atom
According to Newton’s second law, the acceleration of an object depends on its __________.
A. mass and net force
B. mass and balanced force
C. volume and gravitational pull
D. weight and friction coefficient
A. mass and net force
25N --> ☐ <-- 40N
15N
Energy due to motion
Kinetic Motion
A car travels from point A to B in 3 hours and returns back to point A in 5 hours. Points A and B are 150 miles apart along a straight highway. Which of the following statements most accurately describes the motion of the car?
A. The average velocity is 40 miles per hour.
B. The total displacement of the trip is 300 miles.
C. The average speed is 37.5 miles per hour.
D. The car travels at 50 mph for the first half and 30 mph for the second half.
C. The average speed is 37.5 miles per hour.
Galileo
Originally studied of the motions of objects. He rolled balls down an inclined plane to "slow down" their falling and study it.
A lamp sitting on a table demonstrates which law?
A. Newton’s first law
B. Newton’s second law
C. Newton’s third law
D. None of the above laws
A. Newton’s first law because an object at rest stays at rest
<-- 50N ☐ 50N -->
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