Newtons 1st Law
What is Newton's First Law?
An object stays at rest or continues at a constant speed unless acted on by an unbalanced force
What is Newtons 2nd law of motion?
F = ma
It demonstrates the relationship between Force, Mass and Acceleration
Moonwalker!
Choose one person in the class to "Moonwalk"
That team gets 100 points!
What is Kinetic energy?
The energy of motion
What is a force?
A push or pull on an object
What happens when forces are balanced?
Take 150 points from another team!
What is Newtons 3rd law of motion?
For every action there is an equal and opposite reaction
Aussie Aussie Aussie
Your group must stand up and bounce like Kangaroos for 10 seconds
This force slows objects down
Friction
What is Inertia?
An object's ability to resist motion
What happens if mass increases (same force)?
The objects acceleration will decrease
Give an example of an action-reaction force pair
- Walking
- Swimming
- Rocket
What is the equation for Kinetic Energy?
E(k)=1/2mv^2
A force that pulls objects towards each other
Gravity
Swappy Swap
Swap Points with Someone!
Oh no!
-200 Points :(
Lucky!
+300 Points!
We call somethign with both size (magnitude) and direction what?
A vector
A change in position over time is also called?
Motion
Why does a moving object keep moving in space?
Because there is little to no friction in space, inertia keeps the object moving
Mr Luke kicks a futbol with a force of 39N and it accelerates at 13m/s2. What is the mass of the futbol?
3kg
Why doesn’t action-reaction cancel motion?
Because the forces act on different objects, they don’t cancel out
Calculate the Kinetic Energy of a 2kg teddy bear thrown out of a window and moving at a speed of 4m/s
Ek = 1/2 x 2 x 4^2 = 16J
What is Net Force?
Net force is the overall force acting on an object after all forces are combined