Force
What is the definition of force?
A push or pull that acts on an object
Car driving
Contact
Define Friction
Force that results when two materials rub against each other or when their contact prevents it from sliding
An object at rest will stay at rest and an object in motion will stay in motion.
Bonus if you say Inertia
An engine for a big boat will move it as fast as you need. But if you take that same engine (force) and put it on a smaller boat, it will make it move really fast. Which Newton law is this an example of?
Newtons 2nd Law
Every force has these two things.
Strength and Direction
Gravity
Non-Contact
What is something that friction produces
Heat
Acceleration is only when a car speeds up.
False. Acceleration also includes slowing down and changing direction.
What unit are forces measured with?
Newtons
Bat hitting a baseball
Contact Force
If something is slippery, what do we know about the amount of friction?
Less Friction
What is Newton's Second Law about?
The greater the mass of an object, the smaller its change in motion will be. The greater the force applied the greater change in motion will be for a given mass.
Yes, because of the change in direction. Going forward up down and backwards.
If an object is moving it means the forces are ________ and if an object is still it means the forces are __________.
If an object is moving it means the forces are __Unbalanced__ and if an object is still it means the forces are __Balanced__.
Air resistance. Slowing a ball down or a parachute slowing the fall of a skydiver.
Contact Force
If something is grippy or hard to slide on, what do we know about that surface?
Has a lot of friction
A box slides in a car while the car turns. What Newton law is this an example of?
Newtons 1rst law
Inertia is the tendency of an object to resist motion. Would a heavy object or a light object have more inertia?
The heavy object. Harder to get a big boulder to move or a big truck to stop.
There is a box. One person is pushing the box to the left at 120 Newtons and another person is pushing the box to the left at 200 Newtons. Which direction is the box moving?
To the left to the left
Electricity
Non-Contact
The amount of friction between two objects depends on what? (Five possible Answers)
Texture, Shape, Speed, and Weight. It may also depend on if the surface is wet
When you punch a punching bag, you move the punching bag but the punching bag also slows down your hand. You hit the bag and you feel the impact. Which Newton Law is this an example of?
Newtons 3rd Law
Your body rises out of your seat when you drive fast over a hill.
A box slides over in the car when you turn.
When you are running as fast as you can, it is hard to stop immediately.
What are these examples of?
Inertia