ashley is doing a knee extension exercise. She uses a 200 N weight strapped to her ankle 40 cm from her knee joint. She holds her leg so that the horizontal distance from her knee joint to the weight is 30 cm. The calf and the attached weight are held in place by the knee extensor muscles, which have a moment arm of 4.0 cm about the knee joint axis. How much extra force, beyond the force that holds the calf in place, must these muscles produce to hold the weight in the position described
Answers: 3
Physics, 21.06.2019 23:50
Select the correct answer from each drop-down menu. compared to its surroundings, the concentration of solutes is low inside a cell. so, the cell is with respect to its surroundings. a particular solute in this cell uses energy for its transport from the cell to its surroundings. this type of transport is called
Answers: 3
Physics, 22.06.2019 11:00
A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n
Answers: 3
Physics, 22.06.2019 22:00
Acar is traveling 35 mph on a smooth surface . if a balanced force is applied to the car what happens?
Answers: 3
ashley is doing a knee extension exercise. She uses a 200 N weight strapped to her ankle 40 cm from...
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