A 55-kg gymnast applies a vertical ground reaction force of 1,100 N at 0.17 m behind the center of mass during a forward somersault. Assume she is facing the right. What is the torque generated about the center of mass?
a. 279 N-m
b. −92 N-m
c. 187 N-m
d. −187 N-m
A 55-kg gymnast applies a vertical ground reaction force of 1,100 N at 0.17 m behind...
A 60 kg gymnast leaves the floor to perform a somersault, with a reactive force of 2760 N. The center of gravity is 22 cm perpendicular from the line of action of the force. As she first leaves the floor, she can be modelled as a long cylinder with moment of inertia md^2/12 (where d is her length, 1.60 m). The time it takes her to leave the floor is 55 ms. As she leaves the floor calculate: 1. Torque...
A gymnast with mass m-41 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m - 107 kg and length L 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end of the beam. 1j What is the force the left support exerts on the beam? 2) What is the force the right support exerts on the t...
A woman with a mass of 55 kg stands erect on a level ground. What is the approximate magnitude and direction of vertical ground reaction force Fz applied by the person’s weight? The direction of the woman’s weight vector is defined as being negative. A. -540 N B. 540 N C. -121 lbs D. 540 N / 9.81 m/s2
At early stance phase, a runner’s ground reaction force is 1500 N at a 55-degree angle with respect to the ground. If the runner’s mass is 90 kg, what are their accelerations ax and ay?
The vertical ground reaction force acting under a runner’s foot is 1500 N, while the frictional force is 700 N acting forward. What is the resultant of these two forces? What is the angle of the resultant force with respect to horizontal?
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 flea jumps by exerting a force of 1.17 10-5 N straight down on the ground. A breeze blowing on the flea parallel to the ground exerts a force of 1.20 10-6 N on the flea. Find the direction and magnitude (in m/s2) of the acceleration of the flea if its mass is 6.0 10-7 kg. (Let us assume that Fwind points to the right. We will consider this to be the +x direction and vertical to be the +ydirection.)...
A flea jumps by exerting a force of 1.12 10-5 N straight down on the ground. A breeze blowing on the flea parallel to the ground exerts a force of 1.12 10-6 N on the flea. Find the direction and magnitude (in m/s2) of the acceleration of the flea if its mass is 6.0 10-7 kg. (Let us assume that Fwind points to the right. We will consider this to be the +x direction and vertical to be the +y...
Simone, a 47 kg gymnast, is performing the last tumbling pass of her floor routine. The tumbling pass involves running as fast as possible then jumping into the air to complete a double layout with a twist (this exact maneuver, the double layout with a twist, is not important, but a photo is provided on Canvas to show you what this maneuver is). The instant before she jumps into the air, her center of mass (COM) is 0.90 m above...
A 8.62 -m ladder with a mass of 21.1 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 234 N. At the instant the top of the ladder leaves the ground, the ladder experiences an angular acceleration of 1.87 rad/s2 about an axis passing through the bottom end of the ladder. The ladder's center of gravity lies halfway between the top and bottom ends. (a) What...