PHYS 1121 College Physics I Laboratory Basic Laboratory Skills To be completed i
ID: 1573327 • Letter: P
Question
PHYS 1121 College Physics I Laboratory Basic Laboratory Skills To be completed in Two Working Sessions These first three pages to be turned in at the beginning of your first lab session Pre-laboratory Exercise am 1. Consider the triangle shown in the figure below. Assume y- 46.0 m and r 62.0 m. Determine x, the length of the third side of the triangle, in m. Show your work above. Determine the following trigonometric functions of the angles and . Sin(0)- Tan(p)- Now, determine the angles, ie, and e, in both degrees and radians. radians degrees radians degrees = 2. Convert 65 m/s (meters/second) to mi/hr (miles/hour). Show your work here. mi/hr 65 m/s=Explanation / Answer
1] By using Pythagoras Theorem,
x = sqrt (r^2 - y^2)
= sqrt(62^2 - 46^2)
= 41.6 m
sin theta = y/r = 46/62 = 0.74
tan a = x/y = 41.6/46 = 0.9
sin theta = 0.74
theta = arcsin(0.74) = 0.833 radians = 48 degree
tan a = 0.9
a = arctan(0.9) = 0.733 radians = 42 degree
2] 1 m = 10^-3 km
1 hr = 60 min
1 min = 60 sec
1 sec = 1/(60*60) hr
1 km = 0.62 miles
65 m/s = 65*10^-3*60*60 km/hr
= 234 km/hr
= 234*0.62 miles/hr
= 145.08 miles/hr
Answer
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