Types of Energy
What type of energy do moving objects have?
Kinetic
What is the term for the rate at which an object covers distance?
Speed
Which scientist proposed the 3 laws of motion?
SIRRRR Isaac Newton
T or F: The tiny duckie I am holding in my hand has gravity.
True, everything that has mass also has gravity.
An ____________ in an atom has a negative charge
Electron
________ is the ability to do work
________ is a change in position
Word bank: motion, energy
Motion is a change in position
In physics, this equation is commonly used to calculate average speed over a given time interval.
Speed = distance divided by time
Friction
What are the 2 factors that affect gravity?
Mass and distance
Which of the following is not a physical change?
painting a wall
boiling water
burning wood
shredding cheese
What type of energy do appliances such as refrigerators and vacuum cleaners use?
Electrical
Distance = 100 yards
Elapsed time = 10 seconds
What is the speed?
100 divided by 10 = 10 yards per second
Summarize the 1st law of motion in your own words.
Due to inertia, objects that are in motion will stay in motion unless a force is acted upon them. Same with objects that are still.
How do gravity and air resistance affect the rate at which objects fall?
Gravity causes all objects to accelerate down to Earth at the same rate, but air resistance comes into play and causes some things to fall faster than others.
Name that element: Mg
Magnesium
The law of _________ states that energy cannot be created or destroyed.
Law of conservation of energy
Explain how to determine the speed of an airplane in mph that travels from Taiwan to Egypt.
First, determine the amount of miles between Taiwan and Egypt.
Then, record how many hours it takes to cover that distance.
Last, divide the number of miles by the number of hours.
Fun fact: It takes about 17 hours (with one stop)
Object B has a mass of 190 grams.
Which object has greater inertia?
Object A has a greater mass, so it has greater inertia.
which planet in our solar system has the strongest gravitational pull?
Jupiter
What is the atomic mass of Lithium?
3
List at least 5 of 6 main forms of energy
chemical
heat
mechanical
nuclear
radiant
electrical
This famous physicist formulated the theory of relativity, which addresses the relationship between mass, energy, and speed.
Einstein
A car with a mass of 1,500 kg accelerates at 2m/s2. What is the force acting on the car during this acceleration?
1,500 kg x 2m/s2 = 3,000 (Newtons)
the law of __________________________ states that the masses and distance of objects affects the pull of gravity
universal gravitation
How many valence electrons does Calcium have?
2