MATH - SCIENCE INTEGRATION

bullet1 CALCULATING FORCES OF MOTION

bullet2 How Much Do You Remember?

At the beginning of this lesson, we talked about the objectives for this unit. Now you can take a little quiz and see how much you remember.  This can help you get ready for any test or quiz your teacher may be preparing for you.  
Get a piece of paper and pen to write down your answers.
  • What is motion and how is it determined?
  • What is force?  Give an example of a force.
  • Define speed.  What is the necessary information needed to calculate the speed of an object?
  • What is acceleration?
  • Write a description of what happens when a driver presses on the  gas peddle of a car using scientific terms related to acceleration.
  • Define velocity.  How are speed and velocity different?  How are they the same?
  • Define momentum.
  • Describe the difference in momentum between a wagon with one child rolling down a hill and a wagon with two children in it rolling down the same hill.

  • Could you calculate the above wagon's momentum?  What do you need to know in order to calculate the momentum?


Now, go to the next screen and see how you did.  



bullet3 Self-Test Answer Key

Check Your Answers!
  • Motion is the change in position of an object.   Motion is determined by measuring the change of position by using reference points.  The background behind an object can be used as a reference point.  
  • Force is a push or a pull on an object.  Gravity is an example of  force. (There are many examples of forces in your books:  frictional force, air resistance, etc.)
  • Speed is how fast an object is moving.  It is the distance covered in a specific amount of time.  You need to know the exact distance the object moved and divide it by the time it took the object to move to calculate speed.
  • Acceleration is the change in velocity divided by the time interval in which the change occurred.
  • Description:  A car that is not in motion , has someone push on the gas peddle which causes the car to move from its original reference point. The car continues to pick up speed (accelerates) and the acceleration can be measured if the speed is determined (distance /time) and the change in speed is divided by the time it took the car to accelerate.
  • Velocity is speed in a definite direction.  Velocity and speed are different in that speed solutions do not include a direction and velocity solutions must contain a direction.  Velocity and speed are the same in that they both are calculated by taking the distance an object traveled and dividing it by the time it took to travel.
  • Momentum is a product of an object's mass times its velocity.
  • The difference between a wagon with one child rolling down a hill and one with two children is that the wagon with two children will have more momentum because it has more mass (assuming that the wagons were traveling at the same speed).
  • You could not calculate the momentum in this particular problem since the mass and the velocities of the wagons are unknown.  If the masses and velocities were known, then momentum could be calculated.