psc2 054 ☈ Name:

  1. The first four questions are matching. The graph depicts the time versus distance data for four different marbles. One marble was not moving, one marble was slowing down, one marble was speeding up, and one was moving at a constant speed. Use the letters E, F, G, and H at the end of the lines on the xy scattergraph to match the correct line to the marble behavior. Rolling ball background rectangle major grid lines axes x-axis and y-axis linear regression line data points as rectangles E data points as diamonds G data points as circles F data points as triangles H text layers Rolling marbles Time (s) Distance (cm) y-axis labels 0 20 40 60 80 100 120 140 160 180 200 x-axis labels 0.0 1.0 2.0 3.0 4.0 5.0

    _____ Marble not moving: stationary.
  2. _____ Marble slowing down.
  3. _____ Marble moving at a constant non-zero speed.
  4. _____ Marble speeding up.
  5. ____________ Calculate the velocity of a marble that rolls 280 centimeters in 4 seconds.
  6. ____________ Calculate the distance a marble with a velocity of 50 cm/s will roll in 8 seconds.
  7. The following two graphs plot the constant speed linear motion of a RipStik and the accelerated motion of the RipStik. Label the graphs indicating which is graph linear and which is accelerated.
    motion graph motion graph
  8. hot wheels v drop Plate tectonics theory explains which of the following phenomenon (check all that are a result of plate tectonics):
    Earthquakes
    Global warming
    Typhoons
    Volcanoes
  9. ____________________ A Hot Wheels car is rolled from a height h of 80 cm. Use the theoretic equation ѵ=44.2h   to calculate the theoretic velocity of the marble at the bottom of the ramp.
  10. Marbles on ruler track ___________ If two marbles are rolled into a line of five marbles, how many marbles will roll out from the end of the line?
  11. What does Newton's first law say that object will tend to do?
  12. __________ _____ Suppose 65.5 kg Dana is moving at 2 m/s on a RipStik. What is his momentum?
  13. __________ _____ Suppose 65.5 kg Dana is moving at 2 m/s on a RipStik. What is his kinetic energy?
  14. __________ _____ Given that the acceleration of gravity is 9.8 m/s², at what height in meters would 65.5 kg Dana have to be for his Gravitational Potential Energy to be equal to his Kinetic Energy at 2 m/s?
  15. __________ The block and tackle on the crane we viewed in the parking lot had four load lines. What is the estimated Mechanical Advantage for the crane based on their being four load lines?
  16. __________ _____ If the crane with the four load line block and tackle lifts a steel beam with a mass of 800 kg, how much force will the lift motor have to produce?
  17. __________ ______ Given d = ½gt², where g = 980 cm/s², what is the duration in seconds for a marble to fall from a height of 1960 cm?
  18. Does a dropped ball fall faster and faster? How do you know this?
  19. Laboratory 032: On the graph below sketch the time versus distance for a falling super ball. Just a rough sketch to convey the nature of the mathematical relationship.

    Rolling ball background rectangle major grid lines axes x-axis and y-axis text layers Falling super ball Time (s) Distance (cm) y-axis labels 0 50 100 150 200 250 300 350 400 450 500 x-axis labels 0.0 0.2 0.4 0.5 0.6 0.7
  20. Demonstration 041: On the graph below sketch the height versus speed for a Hot Wheels car at the bottom of a ramp when released from height h. Just a rough sketch to convey the nature of the mathematical relationship.

    Rolling ball background rectangle major grid lines axes x-axis and y-axis text layers Height versus Speed for Hot Wheels car height (cm) Speed (cm/s) y-axis labels 0 50 100 150 200 250 300 350 400 450 500 x-axis labels 0 16 32 48 64 80 96 112 128 144 160

slope m= (y2−y1) (x2−x1)
Volume V = length l × width w × height h
mass m = density ρ × Volume V
ρ= m V
distance d = velocity ѵ × time t
ѵ= Δd Δt
a= Δѵ Δt
ѵ = at
d = ½at²
d = ½gt²
where g is the acceleration of gravity.
g = 980 cm/s² (cgs)
g = 9.8 m/s² (mks)
Gravitational Potential Energy = mgh
Kinetic Eenergy = ½mѵ²
momentum = mѵ