All things energy
Energetic vibes
High ho, high ho, it's off to work we go
Lean, mean, scientific machines
According to my calculations
100

Name the SI unit for energy

What is a joule

100

This type of energy is made up of the total kinetic energy of the moving atoms and molecules of an object. 

Thermal energy

100

What 2 conditions must be met for work to be done?

1. Object must move as a result of a force acting on it. 

2. The acting force must be in the direction of the object's motion

100

What is the purpose of a machine ?

A machine makes work easier

100

Calculate the work with the following information : 

F= 19.6 N

D=1.5m

w=29.4  J

200

In science, energy is defined as the 

ability to move or change matter in some way

200

What is Chemical Energy?

Chemical energy is the energy stored in the chemical bonds of the molecules of a substance

200

How does gravity do work?

Gravity produces a downward force. Gravity does work as potential energy is converted to kinetic energy. 

200
In what 3 ways can a machine change a force to make work easier?

1. A machine can change the size of a force

2. a machine can change the direction of a force

3. A machine can change the distance over which a force is applied


200

What is the distance of work completed if the force is 19.6 N and the work done was 58.8 J?

D= 3m

d=w/f

300

What does the kinetic energy of any moving object depend on?

The kinetic energy of any moving object depends on the object's mass and it's speed
300

This type of energy can travel through space in the form of waves and is the energy reflected or emitted from objects.

Electromagnetic energy or light waves

300

What is the equation for work?

W=FxD

300

What is a machine's mechanical advantage?

The number of times a machine increases or decreases the input force. 

300

What is the SI unit for power?

W= watt

400

What is the formula for Kinetic Energy?

KE=1/2 x m x v2

400

Name two types of potential energy 

Gravitational and elastic

400

What is the mathematical equation for the following sentence?

Power is the work an object does divided by the time it takes to do the work. 

P = w/t

400

What does the law of conservation of energy state?

Energy cannot be created nor destroyed, it can only be converted from one form to another or transferred from one object to another.


400

Solve for kinetic energy : 

m=100kg

v=10m/s

ke=? in J

5,000 J

500

What is the equation for gravitational potential energy? Extra 50 points if you tell me what the value for g is. 

PE=m x g x h

G= 9.8m/s2

500

The total __________ __________ of an object is the sum of its potential and kinetic energies

mechanical engergy

500

What is the definition of work? 

What is the definition of power?

Work is the product of a force applied in the direction of motion of an object and the distance the object moves.


Power is the amount of work done each second. 

500

How does the law of conservation of energy apply to machines. Does this help us to conserve our own energy when we use machines?

yes. The law of conservation of energy demonstrates energy being transferred from one from to another. Machines change the force strength or the distance over which the force is applied. 

500

Solve for PE: 

m= 62.0 kg

g= 9.8m/s2

h=5.0 m

PE=? in J?

3,038 J

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