Definitions
This is a push or a pull
A Force
This equation helps us calculate forces
F=ma
In a tug of war, the red team pulls with 80N and the right team pulls with 100N. What is the net force?
20N to the right
As you increase the mass, but keep the force the same, what happens to the acceleration.
It decreases
Ruby the cat has a mass of 5kg, and accelerates at 15m/s2 to jump up her cat tower. How strong is the force she jumped with?
F=75N
The amount of matter in a space
Mass
The F stands for this concept
Force
Two people are pulling a rope from left. Each person pulls with a force of 20N.
Three people pull from the right, each with a force of 10N.
What is the net force acting on the rope?
10N to the left
As you increase the Force but keep the mass the same, what happens to the acceleration?
It increases
Mr. Mandel kicks a kickball, with a mass of 0.54kg, at an acceleration of 222.22m/s2. How much force did she kick the ball with?
120N of force (119.9N)
How fast something increases (or decreases!) speed
Acceleration
Mass
Two people are pushing really hard a fridge, but the fridge is not moving. Are the forces acting on the fridge balanced or unbalanced?
Balanced
What happens to the force needed to move on object when the mass increases?
The force needed also increases!
Mason passes the basketball (0.54kg) with a force of 100N. What acceleration does the basketball experience?
185 m/s2
Speed, but with a direction!
Velocity
This equation allows us to calculate mass (m=?)
m=F/a
A car is moving at a constant speed of 10 m/s. Are the forces acting on the car balanced or unbalanced?
Balanced
A big marble and a small marble collide.
1. Which marble would move faster after the collision.
2. Why?
The small marble was hit with a larger force from the large marble.
A soccer ball is kicked with a force of 300N and has a mass of 0.40kg. How much acceleration did it experience?
750 m/s2
Inertia
This equation allows us to calculate acceleration
a=f/m
Franklin is pulling a sled with a force of 10N. The friction force between the sled and the snow is 4N. The sled weighs 2kg. What is the acceleration of the sled?
3 m/s2
Compare the amount of force needed to move a washing machine (70kg) and a fridge (135kg).
1. Which needs more force to move?
2. Why?
You need more force to move the fridge.
A full rollercoaster of Storm Chaser at Kentucky Kingdom has a mass of about 500kg, and experiences a max force of 18500 N. How much acceleration is the train experiencing?
37m/s2