044 Name:

slope= ( y2 − y1 ) ( x2 − x1 )
Gravitational Potential Energy GPE = mgh where the acceleration of gravity g = 980 cm/s²
Kinetic Energy KE = ½mѵ²
momentum p = mass m × velocity ѵ

  1. When a RipStik rolls down hill...
    1. ☐ The RipStik rolls at a constant rate of speed.
    2. ☐ The RipStik rolls less than twice as fast from twice as high.
    3. ☐ The RipStik rolls twice as fast from twice as high.
    4. ☐ The RipStik rolls more than twice as fast from twice as high.
  2. The chart below has three height versus distance functions plotted, each labelled by a letter: A, B, or C. Match the function by letter to the description below.
    Data graph RipStik Data A B C Height (cm) Velocity (cm/s) y-axis labels 0 10 20 30 40 50 x-axis labels 0 25 50 75 100 150 200 250
    1. ___ With increasing height, the velocity increases at an increasing rate.
    2. ___ With increasing height, the velocity increases at a constant rate.
    3. ___ With increasing height, the velocity increases at a decreasing rate.
    4. ___ Which of these functions depicts what really happened on Monday: A, B, or C?
  3. My Corona EXiV car has a mass of 1150 kg. Driving at the state speed limit of 11.1 m/s (that is forty kilometers per hour), calculate the following:
    1. __________ __________ ...the momentum p of the car.
    2. __________ __________ ...the kinetic energy KE of the car.
  4. A marble with a mass of 5.0 grams is 40 centimeters above a table on a banana leaf marble ramp. The marble is released and rolls down the ramp onto the table. Use an acceleration of gravity g equal to 980 cm/s² for this question.
    1. __________ __________ Calculate the Gravitational Potential Energy of the marble before the marble is released.
    2. __________ __________ Determine the Kinetic Energy that the marble should have at the bottom of the ramp.
    3. __________ __________ Calculate the velocity that the marble should have at the bottom of the ramp.
    4. __________ In the laboratory using an actual marble and banana leaf, will the marble have the speed you just calculated?
    5. __________ Will the actual marble be faster OR slower?
    6. Why?
  5. A student rolled marbles into a line of five marbles.
    Marbles on ruler track
    1. _________ If one marble collides with a line of five marbles on a ruler track, how many marbles are ejected (go out)?
    2. _________ If three marbles collide with a line of five marbles on a ruler track, how many marbles are ejected (go out)?
    3. ___________________ If one marble moving very fast collides with a line of five marbles on a ruler track, what is the speed of the ejected marble(s)?
    4. Explain why you think the marbles know what to do.