1. When you are testing to find the mass that must be placed on the end of the s
ID: 1776361 • Letter: 1
Question
1. When you are testing to find the mass that must be placed on the end of the string to counterbalance friction, you need to see whether different masses make the turntable speed up or slow down. When you make this observation, is it necessary to give the turntable a little push to get it started? Explain why the push is required, or why not. 2. If you know that a hanging mass of 8 g makes the turntable slow down after it is started and 20 g makes it speed up, what mass will you next try in finding the mass required to produce constant-speed motion? 3. An object starts from rest and moves 1.60 m along a straight line in 8.00 s, gaining speed steadily. Calculate its final speed. 4. Thin tape is unwinding from a spool with a diameter of 4.20 cm. The speed of a point on the tape is 16.8 cm/s. Find the angular speed of the spool 5. Holding her pet raccoon, a girl stands on the veterinarian's scale, which reads 56.0 kg. The girl herself has mass 52.5 kg. What is the mass of the raccoon?Explanation / Answer
2. mass in between them
m = 15 g
3, d = v0 t + a t^2 /2
1.60 = 0 +a (8^2)/2
a = 0.05 m/s^2
v = v0 + a t = 0.05 x 8 =0.40 m/s
4. w = v /r = 16.8 cm/s / 4.20 cm
w = 4 rad/s
5. 56 = 52.5 + m
m = 3.5 kg
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