Review:Physics Chapter 1

Answer the following using your textbook and calculator when necessary.

Try to not use your NB2 “Best Friend” as you will not have that during your test!

  1. What is motion?
  1. How can you describe the direction of an object’s motion?
  1. What is speed?
  1. Give an example of Metric and English units used to measure speed?
  1. What is velocity?
  1. How is velocity different than speed?
  1. Find the resultant velocity of Mrs. Farrellwho is awkwardly crawling at 1 m/s east while on a bus traveling at 20 m/s in the same direction.
  1. Mr. Kaeser begins skipping at 2 m/s west. His pace increases over 4 seconds and he is now galloping at a rate of 10 m/s west. What is his acceleration?
  1. What can be said about the velocity of an object that is in circular motion?
  1. What is the definition of a force? What are the units for force?
  1. What is net force?
  1. How do you calculate net force when the forces are in the same direction?
  1. How do you calculate net force when the forces are in the opposite direction?
  1. What is the net force when the forces are balanced?
  1. Determine the net force of the following. Which way will it move?

30 N North

45 N West 45 N East

20N South

  1. What occurs when forces are balanced and when they are unbalanced? Be able to describe scenarios in

which forces are balanced and unbalanced.

  1. What is the definition of friction?
  2. How does force affect friction (Does a heavier book have more friction)?
  1. Does a rough or smooth surface have more friction and why?
  1. What effect does surface area have on friction?
  1. What is the difference between kinetic and static friction?
  1. What are the two types of kinetic friction and which one is usually greater?
  1. Name three examples of how friction can be harmful.
  1. Name three examples of how friction can be helpful.
  1. How can you decrease friction?
  1. How can you increase friction?
  1. What is Gravity?
  1. Who is the scientist that determined gravity and how was it determined?
  1. What two factors determine Gravitational force?
  1. Explain how each factor would change gravitational force if they were altered.
  1. Define what mass and weight.
  1. What is each a measurement of?
  1. Explain if the massorweightof an object would change if the object were moved to another planet

and explain why this is.

  1. Mrs. Dome’sinitial speed at the beginning of a raceis 10.8 m/s. When she reaches the end, her speed is 4.5 m/s. It took her 20 s to run the race. Calculate the sprinter’s acceleration. Show your work using the 5-step method. Circleyour final answer.
  1. Knoedler’s scooter accelerates at 20 m/s2. It has a mass of 5 kg. What is the force on the cart? Show your work using the 5-step method. Circle your final answer.