Show:
Force
Motion
Machines
Newton
Energy
100

The force that opposes motion between two surfaces is this.

What is friction?

100
Change in position over time
What is motion?
100
A fishing pole is an example of this simple machine
What is a lever?
100

Two ice skaters pushing against one another and going in opposite directions at the same speed is an example of this law.

What is Newton's third law: For every action, there is an equal and opposite reaction?

100

The ability to do work is this.

What is energy?

200
The force of pull or attraction between two objects
What is gravity?
200

The resistance to change in motion (or lack of motion) is called this.

What is inertia?

200
All simple machines fit into the following two major categories-
What are inclined plane and levers?
200

When a person tries to push their car out of the mud, but it is too heavy, so they ask a friend to help (thereby increasing the force), it is an example of this law.

What is Newton's second law: Force equals mass times acceleration.

200

The transfer of energy from one object to another is this.

What is work?

300
Pushes, pulls, and lifts are all this
What are forces?
300
The velocity of an object is determined by these two factors
What are speed and direction?
300
The reason we use simple machines
What is to increase the output but decrease the amount of work, or input energy needed
300

This is an example of Newton's first law, which states this.

Answers will vary (but in general should be about an object moving or not moving and forces like gravity or friction acting on it to change that motion), and objects in motion will stay in motion and objects at rest will stay at rest unless acted on by outside forces. 

300

The energy that is stored in objects is this, while this is the energy of a moving object.

What are potential and kinetic energy (in that order!)?

400
The amount of matter in an object
What is mass?
400
A change in velocity over time equals this
What is acceleration?
400
The pivot point of a lever is called this, while the object being moved is called this
What are fulcrum and load?
400

True or False: Objects with less mass have greater gravity between them.

What is false- the greater the mass, the greater the gravity between objects.
400

This is the law of conservation of energy.

What is energy can never be created or destroyed, it can only change forms?

500
When a force acts on an object but does not change the object's motion, it is called this
What is a balanced force?
500
Momentum is found by multiplying this times this
What are mass and velocity?
500
A hammer is a first class lever. A fishing pole is this class lever, while a wheelbarrow is this class
What are third and second.
500

Say you are walking down the street with a heavy backpack. These are ways you could increase your speed when doing so, in scientific terms, and the ways forces and laws are impacting your movement.

What are:

- Increase the friction between you and the ground so you can exert more force.

- Increase the force you are using to move your legs more quickly or so you can take bigger steps.

- Decrease your mass (get rid of the backpack) to allow you to move more quickly.

- Gravity is keeping you on the Earth's surface and friction between you and the sidewalk allows you to push off of it with each step.

- Once you start moving, inertia will help you overcome the forces acting against you (law of inertia).

- The less mass you have, the easier it will be to accelerate (force = mass x acceleration).

- As you push off the ground, the ground pushes you back with an equal and opposite force.

500

This is the energy change that occurs when you use a toaster.

What is electrical energy (electricity) is transformed when you turn on a toaster into heat and light energy?