Show:
Newton's Laws
Energy, Work, Power
Simple Machines
Miscellaneous
100
What is Newton's 2nd Law? (Answer in both words and symbols!)
What is F=MA, or Force equals mass times acceleration / you need force to accelerate something that has mass
100
Where does all the energy in our world come from?
What is THE SUN!
100
A doorknob allows you to have enough force to enter and leave every room here at school. What type of simple machine is it?
What is a wheel and axle. The wheel is the doorknob, and the axle is the piece connecting the inside to the outside.
100
What did Isaac Newton invent?
What is calculus - not gravity, no one can INVENT gravity :)
200
What is inertia?
Inertia is an object's resistance to change in motion depending on mass. More mass = harder to start/stop moving
200
Where on a roller coaster is the kinetic energy the highest? Where is potential energy the highest?
Kinetic - at the bottom of the biggest hill. Potential - at the top of the biggest hill.
200
What happens when you spread force out over a greater distance with a simple machine?
LESS IN(put force) and MORE OUT(put force)
200
What are the 3 ways that simple machines can give you an advantage?
Changing Force (less in, more out), Changing Distance (More input = greater distance traveled), Changing Direction (you don't have to move)
300
See image - which law is the picture best describing? Draw in forces.
What is Newton's 3rd Law. Action is push in, reaction is the push back from the other person resulting in moving backward.
300
If you carry your binder around school with a force of 5N, and you travel a total 85 meters, how much work did you do?
Work = Force x Distance, so 5x85 = 425 Joules
300
What is mechanical advantage? What advantage does a simple pulley give you?
What is output force divided by input force. No advantage for force, but YOU don't have to move and can apply force from anywhere!
300
Why do people refer to Oobleck as a Non-Newtonian goo?
What is it acts like a liquid and a solid, so it does not always follow Newton's Laws for liquids/solids.
400
See image. Come to the board to describe how ALL 3 of Newton's Laws apply to this picture.
Answers may vary.
400
What is Power? Look at the picture - which pitcher has more power and how do you know?
What is work divided by time (how long it takes to do work) The bottom right - if he throws 95mph, the ball gets to home plate faster. Quicker work = more power.
400
Why are steep mountain roads built like they are in the picture? (See picture) Which simple machine is at work here?
A road straight up would require too much force. A bent inclined plane or a screw.
400
What are the units of Power? How many of them equal 1 horsepower?
Watts - 746 Watts equals 1 horsepower
500
Why did the chicken cross the road?
What is chickens at rest tend to stay at rest and chickens in motion cross the road (stay in motion).
500
Starting from the sun, where does the energy your body has to answer this question come from? (What type of energy to what type of energy along the way?)
Sun has light energy - plants convert light energy to chemical energy - our body breaks down chemical energy for kinetic energy
500
Look at the picture of the apple corer. What simple machines work together to make this compound machine?
Handle and base are levers. The center rod is a screw. The handle and center rod form a wheel and axle. The skewers on the ends are wedges.
500
An unlucky person goes skydiving and has a faulty parachute. When they hit the ground after reaching terminal velocity, where does the force of impact come from?
The sudden change in speed - acceleration. The person is not big enough to move the mass of the Earth because of inertia, so the person's constant speed is changed drastically.