Determine what torque is created by the dumbbell

Reference no: EM13536006

Leigh is doing a knee extension exercise using a 100 N dumbbell 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 dumbbell is 30 cm.

a. For this position, what torque is created by the dumbbell about her knee joint axis?

b. If the moment arm of the knee extensor muscles is 4 cm about the knee joint axis, what amount of force must these muscles produce to hold the leg in the position described? Ignore the weight of the leg.

Reference no: EM13536006

Questions Cloud

Determine the plate scale and field-of-view : Determine the plate scale and field-of-view for the 8192x8192 pixel MOSAIC imaging camera on the 4-m Mayall Telescope at Kitt Peak Observatory. MOSAIC is a prime focus instrument (f/2.95) and has 15µm pixels

Evaluate the surface charge density : An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm^2, separated by a distance of 1.60 mm. Calculate the surface charge density

Explain the fuel values of this cup is how many kj : A 5 once cup of yogurt contains 6.0 g of protein, 2.0 g of fat, 26.9 g of carbohydrate. the fuel values for protein, fat and car. are 17.38 and 17 KJ/g respectively. The fuel values of this cup is how many KJ

Castle wall does the launched rock hit the ground : King Arthur's knights use a catapult to launch a rock from their vantage point on top of the castle wall, 15 above the moat. The rock is launched at a speed of 21 and an angle of 30 above the horizontal. How far from the castle wall does the launched..

Determine what torque is created by the dumbbell : Leigh is doing a knee extension exercise using a 100 N dumbbell strapped to her ankle 40 cm from her knee joint. For this position, what torque is created by the dumbbell about her knee joint axis

Explain the changege h for the solution process : The changege H for the solution process when solid sodium hydroxyde dissolves in water is 44.4 kJ/mol. when a 13.9 g sample of NAOH dissolves in 250.0 g of water in a coffee cup calorimeter,

Calculate the angular displacement of each wheel : A motorcycle, which has an initial linear speed of 9.1 m/s, decelerates to a speed of 2.0 m/s in 4.5 s, calculate the angular displacement (in rad) of each wheel

Explain nrm spectrum results from photons irradiation : An NRM spectrum results from photons irradiation in which the nuclear spin aligment is flipped

Draw a plot of the voltage versus time : Draw a plot of the voltage versus time for each of the four gates in a four-phase CCD as it reads out the collected charge in each pixel (the clocking waveforms). Be sure to label everything appropriately.

User Account

All Pages