sers/MariahHood/Downloads/Practice%20Test%201.pdf 3. The length of the minute ha
ID: 1882318 • Letter: S
Question
sers/MariahHood/Downloads/Practice%20Test%201.pdf 3. The length of the minute hand is 10 cm. What is centripetal acceleration of the tip of the minute hand of a clock? Use, v-2Tr/T, and then ac ir. A) 3x107 m/s B) 9x10 m/s2 C) 2x103 m/s2 D) 3x10-5 m/s a) A train starts from rest and accelerates uniformly at 4.0 m/s2 for 20 s. The train then moves at a constant velocity of 40 m/s for 5 minutes. The train then slows down uniformly at 2 m/s2 until it is brought to a halt. Find the total displacement of the train? Hint: Find the displacement of the train for each of the legs (there are 3 legs) and add them. Remember, during second leg train moves with constant velocity. 4. Ans: 13200 m b) A chunk of ice breaks off a glacier and falls 30.0 meters before it hits the water. Assuming it falls freely (there is no air resistance), how long does it take to hit the water? Ans: 2.5 s 9 5. Kilauea in Hawaii is the world's most continuously active volcano. Very active volcanoes characteristically eject red-hot rocks and lava rather than smoke and ash. Suppose a large rock is ejected from the volcano with a speed of 25.0 m/s and at an angle 35.0° above the horizontal, as shown in Figure The rock strikes the side of the volcano at o 25 m/s 35 -20 m an altitude 20.0 mExplanation / Answer
3.
R=0.10m, T= 60min = 3600s
v=2r/T = (2*3.14*0.10m)/(3600s) = 1.74*10^-4 m/s
a0=v2/r = (1.74*10^-4)^2/0.10 = 3.0*10^-7 m/s2
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.