Unformatted text preview: A 5. A 25kg child on a playground swing moves with a speed of 4.5 m/s when the 3.0 m
long swing is at its lowest point. The mass of the swing seat is 2.0 kg. Neglect the
mass of the supporting chains. a. What is the angle that the swing makes with the vertical when the child is at the
highest point? b. Assuming the child could pump the swing really fast, what speed at the lowest
point would be required for the Child to cause the swing to go in a complete circle
around its support? q‘ﬁmlg h 3; V2 1 ,L'hv, . Linea;
W a L, -0086: 33 3 0084449357) 2i q 0 6. A 10 kg block is placed on an ideal vertical spring that has been compressed 20 cm
from its equilibrium length. The spring has a spring constant, k = 4500 N/m. When
the spring is released: a. What is the speed of the block as it leaves the spring?
b. What is the maximum height the block achieves above the end of the spring? )( ...
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- Fall '08