Force and Motion

Force and Motion

5th-8th grades

Motion

• Force can cause a change in an object

• Motion is the change in direction, shape or position

• Forces change the position of objects

• Position describes where the object is in relation to another object

• The other object acts as a reference point.

• The reference point is used to support a change in position

Multiple Choice

You can describe the ___________ of an object by saying it is moving in a straight line or is curved around another object.

• position

• motion

• force

• reference point

Multiple Choice

You can also describe where an object is by its __________ in relation to another object.

• position

• motion

• reference point

• force

Multiple Choice

The second object acts as a _____________.

• position

• reference point

• motion

• force

Multiple Choice

When an object changes _______, you know it has ________.

• motion, position

• reference points, motion

• position, motion

• reference points, positions

Speed and Velocity

• Speed is the distance an object moves in a unit of time

• Constant speed is motion at a steady pace; it's an object moving at the same speed over a certain period of time ("cruise control")

• Average speed is the total distance traveled by the object divided by the elapsed time to cover the distance

• Instantaneous speed is an object's speed at a specific moment in time

• Velocity is the speed and direction of a moving object

• Distance / Time = Speed

Multiple Choice

Motion can also be described by finding an object/s ______, or how fast or slow it moves in a certain amount of time.

• direction

• motion

• speed

• velocity

Multiple Choice

In addition, you can describe the object's speed and direction together. This is called ________.

• constant speed

• velocity

• instantaneous speed

• average speed

Force

• An influence or power that can cause a change in an object

• 5 Forms of Force: Gravitational , Magnetism, Friction, Push, Pull

• Gravity is an attractive force that exists between all objects that have mass, "pulls"

• Magnetism is a force of attraction that causes magnetic material to move

• Friction is a force that acts in an opposite direction to movement between two surfaces that are in contact with one another

• Push is the act of applying force in order to move something away

• Pull is the act of applying force to move something towards you

Multiple Choice

______ is the force that attracts and object or mass towards the Earth, it "pulls"

• gravitational

• friction

• magnetism

• push

Multiple Choice

_______ is the act of applying force to move something toward or with you

• push

• pull

• gravity

• friction

Multiple Choice

______ is a force of attraction that causes magnetic material to move

• gravity

• pull

• push

• magnetism

Multiple Choice

_______ is a force that acts in the opposite direction to movement between two surfaces that are in contact with one another

• magnetism

• pull

• gravity

• friction

Multiple Choice

_______ is the act of applying force to move something away

• gravitational

• magnetism

• pull

• push

Multiple Choice

_________ is the cause of change in the position and/or motion of an object

• motion

• force

• action

• direction

Multiple Choice

There are some ways objects in motion are affected. _______, or pushes and pulls, affect the motion of an object.

• Forces

• Positions

• Motions

Multiple Choice

________ is the force that pulls objects down to Earth.

• Friction

• Magnetism

• Gravity

• Pushing

Multiple Choice

_______ is a force that slows things down or can even make them stop.

• Gravity

• Pulling

• Pushing

• Friction

Direction and Acceleration

• Direction is a line or course along which something is moving

• Acceleration is a measure of how quickly the velocity of an object changes.

• Acceleration includes speeding up, slowing down, and changing direction.

Multiple Choice

Did you know acceleration means more than the increase of an object's speed? It also describes an object that is slowing down or changing __________.

• force

• direction

• motion

• velocity

Multiple Choice

Since acceleration is a change in speed or direction that means, ___________ is a change in velocity.

• speed

• acceleration

• force

• motion