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. What happens when one marble is rolled into five marbles on a ruler track?
    2. What happens when two marbles are rolled into five marbles on a ruler track?
    3. How is the number of marbles rolling into a line of marbles related to the number rolling out of a line of marbles?
    4. What happens when the number of marbles rolling into a line of marbles on the ruler track is greater than the number marbles in that line of marbles on the ruler? For example, what happen when six marbles roll into four marbles?
    5. What happens when the marble(s) roll into a line of marbles slowly? Slow in...
    6. What happen when the marble(s) roll into a line of marbles quickly? Fast in...
    7. Does marble speed inbound affect marble number outbound? That is, does speed affect number?
    8. Explain why you think the marbles know what to do.