Energy 1
This tool measures the weight applied to an object, typically in newtons (N).
Forcemeter
What type of energy transformation occurs when you plug in a TV?
Electrical energy to light and sound energy
What force pulls objects toward the Earth?
Gravity
Which of the following is the unit used to measure weight?
Newtons
What type of energy does an object have at it's highest point?
Gravitational Potential Energy
What is the type of energy that a moving car has?
Kinetic Energy
When energy is dissipated, what usually happens to it?
It is lost as heat or sound energy
What force opposes motion when two objects rub against each other?
Friction
The gravity on the moon is approximately how many times weaker than on Earth?
1/6th
What is the force that acts upward on an object, such as a ball, when submerged in water?
Upthrust
How many joules are in 1 kilojoule (kJ)?
1000 joules
What happens to the kinetic energy of a pendulum as it swings higher?
It is transformed into potential energy
What are the non-contact forces?
Gravitational force, electrostatic force, and magnetic force
What is the difference between weight and mass?
Mass is the amount of matter in an object, while weight is the force exerted by gravity on that object.
When a person is seated, this force acts upward from the surface to support their body weight.
Reaction/Normal Force
What is the energy stored in food and fuels?
Chemical energy
When you burn coal to cook food, which two types of energy are transformed?
Chemical energy to thermal energy
What happens to the force of gravity as you move further from Earth’s surface?
It decreases
An object with a mass of 4kg is placed on the Moon. What is its mass on the moon?
4 kg
What design feature helps reduce air resistance on a car or plane?
Streamlining
What is the process that produces energy inside the Sun?
Nuclear fusion
Explain why the total amount of energy in a system remains constant (same) even though energy might be transformed.
Because of the Law of Conservation of Energy, which states that energy cannot be created or destroyed, only transferred or transformed
An astronaut dropped a hammer and a feather on the moon, and they hit the ground at the same time. Why did this happen?
Because there is no air resistance
If a 2kg laptop is on Earth, what is its weight? (Use 10N/kg for gravity)
20 N
This type of force occurs when two ropes pull against each other, each trying to pull the other in the opposite direction.
Tension Force