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?
Homework Answers
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The following figure shows the kinematics and vertical component of the ground reaction force dur...
The graph shows the kinematics (vertical position, velocity, and acceleration) of the center of gravity of...
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.
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?
b)
When does the center of gravity accelerate in the upward direction
and...
A person is standing on a force plate and then jumps off. Below is the measured...
A person is standing on a force plate and then jumps off. Below is the measured vertical ground reaction force. From this information, your goal is to calculate how high they jumped You will be using this same approach in the kinetics lab. 2000 1800 1600 1400 1200 1000 800 600 400 200 C 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 Time [sec Below is a general guide for solving this problem - Use the graph...
GRF: Ground Reaction Forces Jump Impulse: Takeoff Velocity: Jump-height: An athlete did a vertical jump. The...
GRF: Ground Reaction Forces
Jump Impulse:
Takeoff Velocity:
Jump-height:
An athlete did a vertical jump. The measured GRF is shown in the figure below. How high can she jump? 1300 1250 1200 1150 1100 1050 1000 950 900 850 GRF [N] 0 + 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1 1.05 1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2 2.05 2.1 2.15 2.2 time [s]
Problem 39. 39. A jogger generates an impulse on the ground during the time from initial...
Problem 39.
39. A jogger generates an impulse on the ground during the time from initial contact (heel strike) to foot lift off (toe .Total Measured Vertical Impulse __ Estimated Vertical Impulse Force INI 2000..- 1000 Time [s 0 0.2 0.8 1 Heel Strike Toe Off . The vertical force component for heel-toe running typically has two peaks, the first due to iniial heel (or toe) impact on the ground and the second when the foot supports full body weight....
A satellite is effectively a double integrator plant, ie. Ps)-, for which a unity-feedback closed-loop control is implemented as shown in the figure below, with controller C R(S) Ys) for Ke varyi...
A satellite is effectively a double integrator plant, ie. Ps)-, for which a unity-feedback closed-loop control is implemented as shown in the figure below, with controller C R(S) Ys) for Ke varying from 0 to to is shown below: The root loci off Root Locus 0.8 0.6 0.4 x 0.2 -0.2 0.4 0.6 0.8 0 -0.5 -2 2.5 Real Axis Please answer the following questions: i) For certain range of Kc value, the step response of the closed-loop system has...
Water flows around the vertical two-dimensional bend with circular streamlines as is shown in the figure...
Water flows around the vertical two-dimensional bend with circular streamlines as is shown in the figure below. The pressure at point (1) is measured to be pi-25 psi and the velocity across section d-a is as indicated in the table. Calculate the pressure across section o-a of the channel plz) for z = 1 ft. 2(ft) V (ft/s) 0.2 0.4 0.6 8.0 14,3 20.0 19.5 15.6 8.3 0.8 1.0 6.2 0
Create chart or table Consider the system with the impulse response ht)e u(t), as shown in Figure...
Create chart or table Consider the system with the impulse response ht)e u(t), as shown in Figure 3.2(a). This system's response to an input of x(t) 1) would be y(t) h(r ult 1). as shown in Figure 3.2(b). If the input signal is a sum of weighted, time-shifted impulses as described by (3.10), separated in time by Δ = 0.1 (s) so that xt)01-0.1k), as shown in Figure 3.2(c), then, according to (3.11), the output is This output signal is...
A force platform is a tool used to analyze the performance of athletes measuring the vertical...
A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. Starting from rest, a 59.0 kg athlete jumps down onto the platform from a height of 0.590 m. While she is in contact with the platform during the time interval 0 < t < 0.8 s, the force she exerts on it is described by the function below. F = (9...
135° Figure skater Michelle Kwan performs a triple jump. She rotates around her longitudinal axis three...
135° Figure skater Michelle Kwan performs a triple jump. She rotates around her longitudinal axis three times while in the air. The time it takes to complete the jump from takeoff to landing is 0.6 sec. What was her average angular speed for this jump? Express your answer in degrees and radians. (2 pts) Dbao g ni) vloolo l d A discus thrower begins a throwing motion by spinning at an angular velocity of 3.5rad/s. The discus thrower's angular velocity...
Help An object with weight W is dragged along a horizontal plane by a force acting...
Help
An object with weight W is dragged along a horizontal plane by a force acting along a rope attached to the object. If the rape makes an angle with the plane, then the magnitude of the force is F= u sin() + cos(8) where u is a constant called the coefficient of friction. (a) Find the rate of change of F with respect to(0). - W( cos A-sin) (usin 0 + cos 0) df de- (b) When is this...
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.
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?
b)
When does the center of gravity accelerate in the upward direction
and...
A person is standing on a force plate and then jumps off. Below is the measured vertical ground reaction force. From this information, your goal is to calculate how high they jumped You will be using this same approach in the kinetics lab. 2000 1800 1600 1400 1200 1000 800 600 400 200 C 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 Time [sec Below is a general guide for solving this problem - Use the graph...
GRF: Ground Reaction Forces
Jump Impulse:
Takeoff Velocity:
Jump-height:
An athlete did a vertical jump. The measured GRF is shown in the figure below. How high can she jump? 1300 1250 1200 1150 1100 1050 1000 950 900 850 GRF [N] 0 + 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1 1.05 1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2 2.05 2.1 2.15 2.2 time [s]
Problem 39.
39. A jogger generates an impulse on the ground during the time from initial contact (heel strike) to foot lift off (toe .Total Measured Vertical Impulse __ Estimated Vertical Impulse Force INI 2000..- 1000 Time [s 0 0.2 0.8 1 Heel Strike Toe Off . The vertical force component for heel-toe running typically has two peaks, the first due to iniial heel (or toe) impact on the ground and the second when the foot supports full body weight....
A satellite is effectively a double integrator plant, ie. Ps)-, for which a unity-feedback closed-loop control is implemented as shown in the figure below, with controller C R(S) Ys) for Ke varying from 0 to to is shown below: The root loci off Root Locus 0.8 0.6 0.4 x 0.2 -0.2 0.4 0.6 0.8 0 -0.5 -2 2.5 Real Axis Please answer the following questions: i) For certain range of Kc value, the step response of the closed-loop system has...
Water flows around the vertical two-dimensional bend with circular streamlines as is shown in the figure below. The pressure at point (1) is measured to be pi-25 psi and the velocity across section d-a is as indicated in the table. Calculate the pressure across section o-a of the channel plz) for z = 1 ft. 2(ft) V (ft/s) 0.2 0.4 0.6 8.0 14,3 20.0 19.5 15.6 8.3 0.8 1.0 6.2 0
Create chart or table Consider the system with the impulse response ht)e u(t), as shown in Figure 3.2(a). This system's response to an input of x(t) 1) would be y(t) h(r ult 1). as shown in Figure 3.2(b). If the input signal is a sum of weighted, time-shifted impulses as described by (3.10), separated in time by Δ = 0.1 (s) so that xt)01-0.1k), as shown in Figure 3.2(c), then, according to (3.11), the output is This output signal is...
135° Figure skater Michelle Kwan performs a triple jump. She rotates around her longitudinal axis three times while in the air. The time it takes to complete the jump from takeoff to landing is 0.6 sec. What was her average angular speed for this jump? Express your answer in degrees and radians. (2 pts) Dbao g ni) vloolo l d A discus thrower begins a throwing motion by spinning at an angular velocity of 3.5rad/s. The discus thrower's angular velocity...
Help
An object with weight W is dragged along a horizontal plane by a force acting along a rope attached to the object. If the rape makes an angle with the plane, then the magnitude of the force is F= u sin() + cos(8) where u is a constant called the coefficient of friction. (a) Find the rate of change of F with respect to(0). - W( cos A-sin) (usin 0 + cos 0) df de- (b) When is this...
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