I need help with this I wrote an answer, but not sure if I am right. Write-Up fo
ID: 2298584 • Letter: I
Question
I need help with this I wrote an answer, but not sure if I am right.
Write-Up for Lab 11.2: Popper Physics
SCI121 Week 4
Notes: To figure out the average height for the table below, add up the three heights and divide by 3. To figure out the average time add the 4 time measurements and divide by 4.
Table 1: Popper physics data
Trial Number
Maximum Height (m)
1
1.247
2
1.459
3
1.225
Average:
1.31
Trial Number
Time in Air (s)
1
.90
2
.94
3
.82
4
.99
Average:
0.913
Questions:
Note: For question 1, use the equation for Potential Energy listed below; your potential energy is equal to 0.01 kg times 9.8 m/sec squared times the average height (in meters) The answer is in the units of joules.
PE = mgh =
H = h0 + v0t
Trial Number
Maximum Height (m)
1
1.247
2
1.459
3
1.225
Average:
1.31
Trial Number
Time in Air (s)
1
.90
2
.94
3
.82
4
.99
Average:
0.913
Explanation / Answer
PE = m g h = 0.01*9.8*1.31= 0.128 J
H = v0 t - 1/2 g t^2
1.31 = v*0.913 - 0.5*9.8*0.913^2
v0 = 5.91 m/s
KE = 0.5*0.01*5.91^2= 0.175 J
they are close but a little different
% diff = (0.175-0.128)/0.128= 0.367 = 36.7 %
more since it loses energy to sound