Matter In Motion Review

Know the Terms Speed Mass Velocity Friction Weight Force Motion Acceleration Static friction Kinetic friction Reference point A push or pull Speed in a certain direction Moving friction Something that appears to stay in place How much matter is in an object Distance traveled in a certain amount of time Friction between objects that are not moving A change is position over time Measure of gravitational force on an object The rate at which velocity changes Opposes motion between surfaces that are touching

All objects in the universe are in constant motion

Net Forces / Balanced or Unbalanced 2 N 2 N

Net force – Balanced or unbalanced?

Net force – Balanced or unbalanced?

Net force – Balanced or unbalanced?

Know your equations for: Speed Velocity Average Acceleration

Know your units for: Speed Velocity Acceleration Weight Mass

Use your equations to answer questions – Label units correctly! Calculate the acceleration of a car that goes from 20 m/s to 50 m/s in 5 sec.

Use your equations to answer questions – Label units correctly! In 5 seconds, a hot air balloon travels 20 meters. What is the speed?

Use your equations to answer questions – Label units correctly! A car is heading South. It goes 5000m in 500s. What is its velocity?

Use your equations to answer questions – Label units correctly! The distance from point A to point B is 300 m. If a bird was flying at a speed of 10m/s, how long would it take the bird to travel from point A to point B?

Use your equations to answer questions – Label units correctly! What is the average speed of the red walker?

Use your equations to answer questions – Label units correctly! A boat travels 80m/s up-river. The current of the river is 30 m/s down-river.  What is the boat’s resultant velocity?

Use your equations to answer questions – Label units correctly! Ann is at the airport and is in a rush. She normally travels north at 2 m/s. If she gets on a “moving sidewalk “ that travels at 2 m/s north and walks on it, what will be her resultant velocity?

Answer Questions from Graphs

Choose the correct word from the list below to describe the motion taking place in each section. acceleration steady speed stationary 1.OA 2.AB 3.BC 4.CD 5.DE 6.EF

At what time during the journey did the bus reach its greatest speed?

How long was the bus stopped for during its journey?

During which section of the journey did the bus have the greatest acceleration?

Calculate the acceleration of the bus during section DE.

Which section could be described as a deceleration?

Harmful Friction:

Helpful friction

Reduce Friction Increase Friction

Sliding Friction Rolling Friction

Who discovered Gravity?

Amount of Friction Depends on roughness of surface and force pressing them together

The rougher the surface, the greater the friction

The greater the force, the greater the friction

Mass vs. Weight

Distance between objects The Law of Universal Gravitation – all objects in the universe attract each other through gravitational force Masses of objects Distance between objects