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The graph shows the kinematics (vertical position, velocity, and acceleration) of the center of gravity of a diver and the reaction force of the diving boar during the takeoff phase for a 3 1?2 backward somersault dive in the tuck position.
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a) At what time(s) (approximately) does the displacement of the diver change direction? How many times does this occur during the takeoff phase of the dive?
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b) When does the center of gravity accelerate in the upward direction and when does it accelerate in the downward direction?
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c) What is the relationship between the diver’s acceleration curve and the reaction force curve?
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d) What is the relationship between the diver’s position and reaction force curves?
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Homework Answers
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The
graph shows the kinematics (vertical position, velocity, and
acceleration) of the center of gravity of...
The following figure shows the kinematics and vertical component of the ground reaction force dur...
The following figure shows the kinematics and vertical component
of the ground reaction force during a vertical jump. On the figure,
indicate and explain the following events:
(1) Takeoff
(2) Peak vertical velocity
(3) Jump impulse
(4) What is the relationship between force and
acceleration?
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A 75-kg volleyball player performs a maximum-effort vertical jump with an initial velocity of 3 m/s....
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Between figure the acceleration arrow you should draw through each position dot during step 1 sho...
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Please show all your work.
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9. A particle moves along the x-axis so that its velocity v at time t, for0 sts 5, is given by v(t) In(t2-3t +3). The particle is at position x 8 at time t 0. a) Find the acceleration of the particle at time t 4. b) Find all times t in the open interval 0<t <5 at which the particle changes direction. During which time intervals, for 0st s 5, does the particle travel to the left? c) Find...
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birds have evolved to the ability to control their motions through the air by controlling the forces exerted on their bodies by the air; the contact forces on a bird by the air plus the force of gravity on the bird by the Earth determine the change in motion of the bird at any instant of time. In this problem, you will be asked to use what you know about acceleration to track the motion of a diving hawk. A...
birds have evolved to the ability to control their motions through the air by controlling the...
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The following figure shows the kinematics and vertical component
of the ground reaction force during a vertical jump. On the figure,
indicate and explain the following events:
(1) Takeoff
(2) Peak vertical velocity
(3) Jump impulse
(4) What is the relationship between force and
acceleration?
Velocity Acceleration Force 1800-24 6 F0.6 120016 4 0.4 Body weight 600-8 2 0.2 0- 0 -600-8 IE-2 -0.2 0.2 0.4 0.6 0.8 Time (s)
Velocity Acceleration Force 1800-24 6 F0.6 120016 4 0.4 Body...
A 75-kg volleyball player performs a maximum-effort vertical jump with an initial velocity of 3 m/s. The player leaves the ground with an upright body position and also touches down with the same body position. Answer the following: ua A. How much will the player's center of mass (COM) travel in the air along the vertical direction during the ascending phase of the jump? Compute the maximum kinetic energy of the player during the jump. C. Compute the maximum potential...
N3M.12
between figure the acceleration arrow you should draw through each position dot during step 1 should point from the puck's position at that instant toward the table's center, since the Ca string's tension force acts in that direction.] (b) Check your work using the Newton program. N3M.12 In this problem, we will explore the necessary con- t ditions for uniform circular motion. (a) According to chapter N1, an object moving in a circle of radius rat constant speed llexperiences...
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Please show all your work.
5) Acceleration is to velocity as velocity is to position . aaux"# r where vr įs the instantaneous velocity. So the average acceleration is about how rapidly the instantaneous velocity is changing, and the sign tells about the direction of the change. At For the pendulum, you made estimates of the instantaneous velocity for ←2.05[s] and t= 2.5%]. Also, the average speed and average velocity estimates that you made at other times may be reasonable...
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