Consider the woman doing push-ups in the figure. She has a mass of 47.7 kg, and the distance from her feet to her center of mass is 0.84 m, while the distance from her feet to her hands is 1.7 m. a.) What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed. Hints: -Apply second Newton’s law for rotation. What is the best point of rotation to choose? -Pick the point of contact of her feet with floor as the axis of rotation and write torques around this axis. -She moves with constant angular velocity, it means the sum torques around this point is equal 0. b.) The triceps muscle at the back of her upper arm has an effective lever arm of 1.25 cm, and she exerts force on the floor at a horizontal distance of 17 cm from the elbow joint. Calculate the magnitude of the force in newtons for each triceps muscle. Hints: -Calculate the force about her elbow, with the triceps muscle acting on one side and the floor acting on the other. -Since we are giving you the lever arms, you don't need to know the angle at which these forces are acting. *Please answer fully, if possible with the formulas stated before too so that it is easily understood. a.) What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed. Hints: -Apply second Newton’s law for rotation. What is the best point of rotation to choose? -Pick the point of contact of her feet with floor as the axis of rotation and write torques around this axis. -She moves with constant angular velocity, it means the sum torques around this point is equal 0. b.) The triceps muscle at the back of her upper arm has an effective lever arm of 1.25 cm, and she exerts force on the floor at a horizontal distance of 17 cm from the elbow joint. Calculate the magnitude of the force in newtons for each triceps muscle. Hints: -Calculate the force about her elbow, with the triceps muscle acting on one side and the floor acting on the other. -Since we are giving you the lever arms, you don't need to know the angle at which these forces are acting. *Please answer fully, if possible with the formulas stated before too so that it is easily understood.
Consider the woman doing push-ups in the figure. She has a mass of 47.7 kg, and the distance from her feet to her center of mass is 0.84 m, while the distance from her feet to her hands is 1.7 m.
a.) What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed.
Hints:
-Apply second Newton’s law for rotation. What is the best point of rotation to choose?
-Pick the point of contact of her feet with floor as the axis of rotation and write torques around this axis.
-She moves with constant
b.) The triceps muscle at the back of her upper arm has an effective lever arm of 1.25 cm, and she exerts force on the floor at a horizontal distance of 17 cm from the elbow joint. Calculate the magnitude of the force in newtons for each triceps muscle.
Hints:
-Calculate the force about her elbow, with the triceps muscle acting on one side and the floor acting on the other.
-Since we are giving you the lever arms, you don't need to know the angle at which these forces are acting.
*Please answer fully, if possible with the formulas stated before too so that it is easily understood.
a.) What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed.
Hints:
-Apply second Newton’s law for rotation. What is the best point of rotation to choose?
-Pick the point of contact of her feet with floor as the axis of rotation and write torques around this axis.
-She moves with constant angular velocity, it means the sum torques around this point is equal 0.
b.) The triceps muscle at the back of her upper arm has an effective lever arm of 1.25 cm, and she exerts force on the floor at a horizontal distance of 17 cm from the elbow joint. Calculate the magnitude of the force in newtons for each triceps muscle.
Hints:
-Calculate the force about her elbow, with the triceps muscle acting on one side and the floor acting on the other.
-Since we are giving you the lever arms, you don't need to know the angle at which these forces are acting.
*Please answer fully, if possible with the formulas stated before too so that it is easily understood.
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