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1. A 2.50 kg mass is hung at rest on the end of a spring held vertically from a rod. The initial
displacement of the mass is 0.065 m and the spring has a spring constant of 3 N/m. When the
spring-mass system is oscillating, the period of oscillation is -
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a. 0.91 s
b. 1.10 s
c. 5.23 s
d. 5.74 s

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.