Exploring Ocean Forces
When you added more force to your paddle, what happened to the water in the wave tank?
The water made more waves (more motion)
Is this balanced or unbalanced?
100 N <------ ------> 100 N
Balanced
What is the equation?
F = ma
What was Isaac Newton's greatest discovery?
The laws of motion
What is a force?
A push or pull that causes an object to change its motion.
The waves moved faster and there was more water splashing (had more motion)
Is this balanced or unbalanced?
50 N <---- -------> 100 N
Unbalanced
If the mass of an object increases, the force applied to the object must ____________ for it to have the same motion (acceleration).
increase
How many laws did Newton discover?
3
What is motion?
The act or process of changing position or location.
If two force arrows with the same length were pointing in the same direction on an object, would the object be moving or at rest? Explain.
The object would be moving since two forces are acting on the object (pushing or pulling it) in the same direction.
Newton's 1st Law is also known as the law of ___________.
Inertia
Emmy and Janice are competing in a shot put competition. Emmy throws a shot (ball) with a mass of 6 kg. Janice throws a shot with a mass of 4 kg.
If they have the same acceleration, which athlete used less force on the shot (ball)?
Janice, because her shot had less mass.
What type of scientist was Isaac Newton?
Physicist
What is mass?
The amount of matter in an object.
OEC Devices: Explain what happened when you removed the funnel and poured the water directly to your turbine. Why did this happen?
The water turbine moved faster (with more motion) because a greater mass of water fell on it, thus producing a greater force.
Is this balanced or unbalanced?
Isabella is picking up her plant as she cleans her room. She is pulling the plant up with a force of 20 N. Earth's gravity is pulling the plant down with a force of 15 N.
Unbalanced
A dart player is throwing darts with the same force. The blue dart has a mass of 31 kg, the red dart has a mass of 25 kg, and the green dart has a mass of 19 kg.
Put the darts in order from larger acceleration to smaller acceleration.
What is named after Isaac Newton himself?
The units for force (Newtons)
What is an independent variable?
Something YOU change in an experiment or investigation.
If Atticus Power wants to observe how the mass of the turbine will affect OEC devices' motions, which of the following will be the control variable?
a. Mass of the turbine
b. Acceleration (motion) of an OEC device
c. Force of the ocean waves
C. Force of the ocean waves
A control variable is something that stays the same during the experiment. Since Atticus Power wants to focus on mass vs motion, force needs to stay constant.
Three dogs, Buddy, Ruby, and Astro, are playing with a teddy bear. Buddy and Ruby are pulling the teddy bear to the left. Buddy is pulling with a force of 150 N, and Ruby is pulling with a force of 160 N. Astro is pulling the teddy bear to the right with a force of 200 N.
Are balanced forces or unbalanced forces acting on the teddy bear?
There is a 310 N force pulling to the left and only a 200 N force pulling to the right.
A ship carries different loads of objects with the same acceleration. Cannons = 100 kg, Logs = 30 kg
Which load will need a larger force: 5 cannons or 10 logs?
5 cannons
When OR where was Isaac Newton born?
England, 1642
What is a dependent variable?
Something you measure in an experiment. It changes due to what you are testing.