054 • Name:

For answers with units, do not forget to include the units: numeric answer units!

  1. When a young typhoon develops hot towers of rapidly rising warm air, what will happen to the strength of the typhoon?
  2. What is the importance of the sinking salty brine water under the ice of Antarctica?
  3. The Bodele depression of the Sahara desert in Africa contains rich deposits of the plant nutrient phosphate. How does this phospate wind up fertilizing trees in the rain forests of Brazil, South America?
  4. The following time versus data was obtained during a Tuesday morning RipStik acceleration run.
    Graph with shapes fed by different functions background rectangle major grid lines axes x-axis and y-axis linear regression line Linear regression equation manually placed y = 15x² data points as circles text layers RipStik acceleration time (s) distance (cm) y-axis labels 0 150 300 450 600 750 900 1050 1200 1350 1500 x-axis labels 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
    Time (s)Distance (cm)
    0 0
    1 15
    2 60
    3 135
    4 240
    5 375
    6 540
    7 735
    8 960
    9 1215
    101500

    1. __________ Based on the graph is the RipStik going faster and faster?
    2. __________ __________ Use the data provided and the formula slope= ( y2 − y1 ) ( x2 − x1 ) to calculate the velocity of the RipStik from 0 to 1 second.
    3. __________ __________ Use the data provided and the slope formula to calculate the velocity of the RipStik from 9 to 10 seconds.
  5. __________ __________ Using the equation d = ½gt² and an acceleration of gravity g = 980 cm/s², calculate the distance a ball will fall in one second.
  6. __________ __________ Using the equation d = ½gt² and an acceleration of gravity g = 980 cm/s², calculate the length of time in seconds for the ball to fall 100 cm.
  7. My Corona EXiV car has a mass of 1150 kg. Driving at the state speed limit of 11.1 m/s, calculate the following:
    1. __________ __________ ...the momentum p of the car using p = m ѵ.
    2. __________ __________ ...the kinetic energy KE of the car using KE = ½mѵ².
  8. The chart below has three functions plotted, each labelled by a letter: A, B, or C. Use the shape to match the function by letter to the description below.
    Data graph A B C y-axis labels x-axis labels
    1. ___ Time versus distance for a RipStik moving at a constant velocity.
    2. ___ Time versus distance for an accelerating RipStik.
    3. ___ Height versus speed for a marble on a marble leaf ramp.
  9. 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 using GPE = mgh
    2. __________ __________ Use the law of the conservation of energy to report the kinetic energy that the marble should have at the bottom of the ramp if there is no friction.
    3. __________ __________ Calculate the velocity that the marble should have at the bottom of the ramp using the equation KE = ½mѵ² if there is no friction.
    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?
  10. 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)?
  11. Write out Newton's first law of motion.
  12. Write out Newton's second law of motion.
  13. Write out Newton's third law of motion.
  14. For reference, the graphs show force of friction data gathered by the students in SC 130 for surface area, grit, and mass.
    force of friction linear regression data
    1. According to the data you gathered in the laboratory on Thursday, which variable had the most effect: sandpaper grit, surface area, or the mass of the glass sled?
    2. According to the data you gathered in the laboratory on Thursday, which variable had the least effect: sandpaper grit, surface area, or the mass of the glass sled?

slope= ( 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
ѵ= Δd Δt
distance d = velocity ѵ × time t
ѵ = at
ѵ = gt
d = ½at²
d = ½gt²
where g is the acceleration of gravity
g = 980 cm/s²
Gravitational Potential Energy GPE = mgh where the acceleration of gravity g = 980 cm/s²
Kinetic Energy KE = ½mѵ²
momentum p = mass m × velocity ѵ