
Calculate the velocity of the center of mass of the body just after a vertical squat...
Calculate the height of the center of mass above its starting height during a squat jump based on the following information: BW = 777 N, total vertical force = 899 N, and time of force application = 0.93 seconds. The answer is 0.10 m, just not sure how to get there. Thank you in advance.
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...
An elderly person with a body mass of 65 kg is walking while using a cane in one hand. If the upward force that the cane applies to the hand is 117 N and the vertical acceleration of the body center of mass is 1.32 m/s^2, what is the magnitude of the vertical ground reaction force? Assume that only one foot is on the ground and the other leg is in the swing phase
A 10 kg bar shown is currently moving with a center of mass
velocity of 1 m/s to the right. What is the angular velocity of the
bar at this instant in rad/s?
QUESTION 1 A 10 kg bar shown is currently moving with a center of mass velocity of 1 m/s to the right. What is the angular velocity of the bar at this instant in rad's? (gravity is acting in the vertical plane) 0.75 m V = 1...
A mass of 5kg is on top of a building of height 10m. Calculate its potential energy. The mass then falls at a speed of 8 m/s in 4 sec, find its KE and momentum p. What is the Force and impulse the mass transfers to the ground?
26.) A mass of 5kg is on top of a building of height 10m. Calculate its potential energy. The mass then falls at a speed of 8 m/s in 4 sec, find its KE and momentum p. What is the Force and impulse the mass transfers to the ground? 27.) For problem 26 above, find the work done by gravity if the mass falls a distance 2 meters. If the mass falls for 11 seconds, what is the energy...
3. The Growing Ostrich
Ostriches go through a large change in body mass as they grow from
hatchlings to adults. Body
mass increases 25 fold as the bird develops from a four week
hatchling to a full grown adult. If
they grow isometrically, then by what proportion will their optimal
stride frequency during walking
change as they grow into adults? By what proportion will their
maximum walking speed change?
Answer
The optimal stride frequency changes by a factor of 1.72...
26.) A mass of 5kg is on top of a building of height 10m. Calculate its potential energy. The mass then falls at a speed of 8 m/s in 4 sec, find its KE and momentum p. What is the Force and impulse the mass transfers to the ground? 27.) For problem 26 above, find the work done by gravity if the mass falls a distance 2 meters. If the mass falls for 11 seconds, what is the energy expended...
26.) A mass of 5kg is on top of a building of height 10m. Calculate its potential energy. The mass then falls at a speed of 8 m/s in 4 sec, find its KE and momentum p. What is the Force and impulse the mass transfers to the ground? 27.) For problem 26 above, find the work done by gravity if the mass falls a distance 2 meters. If the mass falls for 11 seconds, what is the energy expended...
Suppose the vertical height h that Supergirl can jump after she compresses her tendons a distance x1 (beyond her unstretched length) is 25m. How high would she jump after she has compresses her tendons an additional 10% more than before (that is a distance 1.10x1 beyond her unstretched length)? A block of mass 3kg slides along a horizontal table with speed 10m/s. At x = 0 it hits a spring with spring constant 10N/m and begins to experience a friction...