034 psd1 ⚇ Name:

Graphs background rectangle major grid lines linear C non-linear B parabola A axes text layers Graph two: RipStik Data Time (s) Distance (cm) y-axis labels 0 100 200 300 400 500 600 700 800 900 1000 x-axis labels 0 1 2 3 4 5 background rectangle major grid lines axes x-axis and y-axis linear regression line data points as circles text layers Graph one: Soap density volume (cm3) mass (g) y-axis labels 0 11 22 33 44 55 66 77 88 99 110 x-axis labels 0 10 20 30 40 50 60 70 80 90 100

  1. __________ __________ Based on graph one, what is the density ρ of the soap ?
  2. ______________ Will the soap float or sink?

    Graph two shows the time versus distance data gathered for three different RipStik runs A, B, and C. The first three questions are matching. Use the letters at the end of the lines on the xy scattergraph.
  3. _____ RipStik moving at a constant speed, no acceleration.
  4. _____ RipStik moving faster at a constant rate of acceleration.
  5. _____ RipStik moving with a non-constant acceleration .
  6. _______ ___________ Determine the speed of RipStik run C.
  7. _______ ___________ Determine the speed of RipStik run B from 0 to 3.5 seconds.
  8. _______ ___________ Determine the speed of RipStik run B from 4.5 to 5 seconds.
  9. _______ ___________Toughie: Given that for run A distance = ½*acceleration*time² and the coordinate (3 s, 900 cm) shown on the graph, calculate the value of the acceleration. Short form of equation: d=½at²
  10. __________ ______ Using the equation d = ½gt², calculate the distance a ball will fall in one second. Use 980 cm/s² for the acceleration of gravity g.
  11. __________ Does the above distance roughly agree with the data you gathered in Thursday's laboratory?

    024 RipStiking the solar panels background rectangle major grid lines axes x-axis and y-axis linear regression line Linear regression equation manually placed y = 200 x + 20 data points as circles text layers Graph three: RipStik linear velocity Adapted from solar panel surfing time (s) dist (cm) y-axis labels 0 350 700 1050 1400 1750 2100 2450 2800 3150 3500 x-axis labels 0 2 4 6 8 10 12 14 16 18 20
    __________ _________ Graph three was generated when I rode the RipStik on Monday. The x-axis is time in seconds, the y-axis is the distance in centimeters. The equation of the line is y = 200x + 20. What is the velocity of the RipStik (including units)?
  12. _________ __________ If I kept on riding the RipStik at the above velocity for 180 seconds, use the given equation to determine how far I would go.
  13. _________ __________ Palikir Elementary School is 100,000 centimeters away. If I rode to Palikir Elementary at the same velocity as I had on Monday, how long in seconds would that RipStik ride take?
  14. _________ __________ The Ball Bowling graph on the above right is taken from the ball rolling data gathered on Thursday. What is the speed of the ball (including units)?
  15. A tennis ball is thrown in an arc. The ball obeys the equation y = − ( 50 252 ) x2 + 50 Sketch the arc of the ball on the graph below.
    Rolling ball background rectangle major grid lines axes x-axis and y-axis text layers Falling super ball x (cm) y (cm) y-axis labels 0 5 10 15 20 25 30 35 40 45 50 x-axis labels -25 -20 -15 -10 -5 0 5 10 15 20 25
  16. In laboratory three most lab teams obtain a value for the acceleration of gravity that is below the theoretic value. Very few teams arrive at a value that is too large. What might be the cause of the low values for g? Why is this happening?

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 Energy = ½mѵ²
momentum = mѵ