Please answer the following questions. Please ignore any markings or answers on
ID: 1792980 • Letter: P
Question
Please answer the following questions. Please ignore any markings or answers on the sheet. I am unsure if they are correct.
IL. When you jump into the air and reach your peak jump height, what is your vertical velocity (V) and your vertical acceleration (a) at this instant in time? b. V- 9.81 m's, a-0 m/s -981 ms d V-981 m/sa-9.81m/s 49.81 m/s 12. Stabilily may be increased by a raising the center of mass , widening the base of support b. losing weight d narrowing the base of support 13. If you jumped from the same height into water as opposed to oato concrete, it would take the same impulse in both cases to redace your speed to zero velocity a true b. false 14. For static equilibrium, what is the force F required from the biceps given the following: 1) the tendon inserts 3 from the elbow joint center and is at 90 degrees to the forearm; 2) the weight of the forearm is 95 N and can be considered to act at a distance of 25.5 cm from the elbow joint center 807.5N a 950 N b. 800N c.708 .5N 15. A centrifugal force a causes one to be thrown inco the side of the car daring a sharp turn is a "center-fleeing" force c. has the same direction as centripetal force d. is a "center-seeking" force 16. For a skater spinning with a constant gnlar velocity about the long axis with her arms out, if the mos distal point on her hand is twice the distance from the axis of rotation as the elbow joint center, the elbew will have a linear velocity equal to that of the most distal point on the hand 1twice b.alf c.four times d, the same as 17. Which of the following influences the moment of inertia? a. mass b. radius of gyration location of the axis of rotation 18 An angle formed between the longitudinal axes of two adjacent body segments is defined as alm): of the above relative angle b. absolute angle c.segmental angle d. acute angle 19. Springboard divers assume an extended body position prior to entry into the water in order to decrease a. angular velocity b angular impulse c. angular momentum d. moment of inertia 20. If the vertical ground reaction force is less than body weight, which way is the center of gravity moving a upwards b. downwardsneed more information to answer the question 21. BONUS: In England, what is a conker? a. an idiot b. someone's head c.car horn d. someone's nose eanutExplanation / Answer
1.at peak v = 0
and a = - 9.81 m/s^2 all the time
Ans: (C)
2. (C) widening the base support
3. impulse = change in momentum
= m (vf - vi)
vi will be same as height is same.
vf = 0 for both cases.
hence impulse will be same.
Ans (true)
4. M = (3 x FT) - (25.5 x 95) = 0
FT = 807.5 N
Ans(d)
15. (a) causes one to be thrown into the side of the car during sharp turn
(B) is a center fleeing force.
16. v = w r
r for elbow is half of the value of distal point.
(b) half ]
17. (d)