Force
Newton's First Law
Newton's 2nd Law
Newton's 3rd Law
Law of Universal Gravity
100
In order for an object to be put in motion this needs to happen...
What is a force (a push or pull)?
100
The tendency of a body to continue at rest or in motion in a straight line with a constant speed until acted upon is called... Hint- the other name for Newton's First Law
What is inertia?
100
Describe the motion in terms of Newton's 2nd Law: What might happen to YOU if you were riding your bike quickly down a hill and stopped suddenly?
What is, "I would probably fly over the handle bars...because of inertia - although the bike stopped, I want to keep moving"?
100
When you walk across the ground and push on it with your feet...this is what the ground "does"....
What is "pushes back on your feet with equal force"?
100
These 2 forces act upon a feather that is dropping.
What are gravity and air resistance (friction in the air)?
200
The unit of measure for force.
What is a Newton?
200
TRUE or FALSE: A force is always needed to keep an object in motion.
What is FALSE? (It is just as natural for a body to be at a constant speed as it is to be at rest.)
200
If an object has a constant acceleration and a large mass then the force needed to change it would be __________. a. not that large b. large c. the same as the acceleration d. it can't ever change
What is "large"?
200
If your pencil rolls off the desk, it will be pulled down to the floor by gravity. Explain why the pencil doesn't pull up the floor.
What is: The Earth has a larger mass than the pencil and/or the Earth has the stronger gravitational pull than the pencil?
200
True or False... If a heavy boulder and a small marble were dropped from a tall building at the same time, which would hit the ground first?
Neither - They would hit at almost the same time.
300
This force always pulls "downward" on an obect.
What is gravity?
300
This Italian man inspired Sir Isaac Newton to define his Laws of Motion and Gravity.
Who was Galileo?
300
This is the equation that best describes Newton's 2nd Law.
What is F = MA (Force equals Mass times Acceleration)
300
Newton's 3rd Law of Motion states that an object in motion will stay at motion and an object at rest will stay at rest unless...
What is "acted upon by an outside force"?
300
The measure of force gravity pulls on an object...
What is weight?
400
This force pushes or pulls in the opposite direction that the object is sliding and acts parallel to the surfaces in contact.
What is friction?
400
A change to an object's motion is caused by: a. balanced forces b. unbalanced forces c. massive forces d. business forces
What are unbalanced forces?
400
When you slide a box across the floor, this is the force that your push must be stronger than...
What is friction?
400
For every action there is an __________and opposite______________.
What is "equal" and "reaction"?
400
The force of attraction between objects.
What is gravity?
500
If a ball is swung around on the end of a string, the string exerts centripetal force on the ball and causes it to follow a curved path. If the string breaks, the ball flies off on a tangent (straight line) is said to exert _______________ force (a form of inertia).
What is centrifugal force?
500
Which of the following has the greatest inertia? a. an airplane b. a computer c. a toy car d. a puppy
What is an airplane?
500
The moon has a smaller mass than the Earth. If you were able to travel to the moon, your weight would...
What is decrease (be less)?
500
Your couch at home is "at rest". Which of the following best describes this situation... a. there are no forces acting on it b. the couch is pushing on your floor only c. the floor is pushing on the couch only d. the forces acting on the couch are balanced
What is (d.) the forces acting on the couch are balanced?
500
This person was inspired by a falling apple to define the Law of Universal Gravity.
Who was Sir Isaac Newton?
M
e
n
u