What is a PUSH or PULL on an object?
Force
CONTACT or NON-CONTACT FORCE?
A boy using his foot to kick a soccer ball.
A. Contact
B. Non-Contact
B. CONTACT FORCE
The force that acts directly against the direction of motion, usually when two surfaces come in contact and rub against each other.
What is friction?
A golf ball rolls down a hill on the golf course. Which statement best describes how friction affects the motion of the golf ball?
A. Friction causes the golf ball to roll forwards and backwards.
B. Friction decreases how far the ball rolls.
C. Friction increases how fast the ball rolls.
D. Friction causes the ball to bounce.
B. Friction decreases how far the ball rolls.
The pull of gravity affects the objects what?
What is weight?
If these boys are each pulling with the force of 10 newtons. What will happen?
The boy in blue will win.
They will not move at all.
The boy in red will win.
They will not move at all. Balanced force is being applied.
Equal
What is a change in the velocity of an object considered?
ACCELERATION
When the speed of an object stays the same.
What is constant speed?
An objects location is its ________.
What is position?
Which of the following statements is true?
Balanced forces cause a change in position.
Unbalanced forces cause a change in position.
Forces do not affect position.
Unbalanced forces cause a change in position.
CONTACT FORCE or NON-CONTACT FORCE:
Using your fingers to play the piano.
A. Contact Force
B. Non-Contact Force
A. Contact Force
What is the distance traveled per unit of time?
What is SPEED?
I have a change in speed, but NOT direction, is this acceleration? Y/N
Yes
What do you call the speed AND direction of a moving object?
It's VELOCITY
What is the formula for Newton's second law of motion?
F=M*A
CONTACT OR NON-CONTACT FORCE?
The magnetic needle of a compass always points north.
A. Contact Force
B. Non-Contact Force
B. Non-Contact
What is more reliable in physics: weight or mass?
Mass
poles
In outer space, an object's ______ changes, but its _______ stays the same.
What is weight and mass?
What does Newton's law of Inertia state?
An object at rest (in motion) will stay at rest (in motion) unless acted on by another force.
IF 5 students push a block to the East with a force of 12 newtons and were joined by 3 more students who contributed 8 more newtons but we opposed by 7 students pushing the block westward with a force of 18 newtons, which direction would the block move and what is the net force?
The block would move to the east with 2 newtons of force.
True/False:
Action and reaction forces DO NOT cancel out because they act on different objects
True
1. What happens when the same poles of 2 different magnets are facing each other?
2. What happens when opposite poles of 2 different magnets are facing each other?
1. Same poles REPEL.
2. Opposite poles ATTRACT.
What is the average speed of a train that covers 80km in 1 hr, 200 km in 2 hrs, and 420 km in 4 hrs?
80 + 200 + 420 = 700
1 + 2 + 4 = 7
700/7 =
100 km/hr
What was the main objective of the lab we did; "Stopping on a Dime" and what 2 data points did we need to gather to find out the answer?
We had to find out where it was safe for the band to set up past the out of bounds line on a basketball court. To do that we needed to find the average speed and stopping distance of the "players"
An object or person that is used as comparison to determine if an object is in motion is called what?
REFERENCE FRAME
What is the basic understanding of Newton's 3rd law of motion?
For every action there is an equal and opposite reaction.
Name a magnetic metal
What is Iron?
What always changes when an object is in motion?
a. its direction
b. its speed
c. its mass
d. its position
D. Its position