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The Achilles tendon inserts on the calcaneus at a distance of 8cm from the axis of the ankle joint. The force generated by the muscles attached to the Achilles tendon is 3000N, and the moment arm of this force is 5cm. a) Draw a free body diagram of the situation. b) What torque is created by these muscles about the ankle joint?
A 15.0 m uniform ladder weighing 500 N rests against a frictionless wall. The ladder makes a 60.0 angle with the horizontal. Find out the horizontal and vertical forces the ground exerts on the base of the ladder when an 800 N fire-fighter is 4.00m f..
A 5kg steel ball strikes a wall with a speed of 8m/s at an angle of 60.0° with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for 0.200 s, what is the average force exerted by the wall on the ..
Two spherical conductors are connected by a long conducting wire and a total charge of 20.0 μC is placed on this combination. One sphere has a radius of 4.0 cm while the other has a radius of 6.0 cm. Explain the reasoning of the steps that allow you ..
Using the kinematic equation, prove that if two balls are released simultaneously from table, one with zero velocity and the other with a horizontal velocity, they would both reach the ground at the identical time.
An ocean liner leaves New York City and travels 12.0° north of east for 111 km. How far east and how far north has it gone? In other words, what are magnitudes of the components of the ship's displacement vector in the directions.
Find the work done by this force on the particle and the final speed of the particle as it moves along a path.
A 1.80 MHz sound wave travels through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward sound receiver as the heart beats.
A 3m-long rigid beam with a mass 140 kg is supported at each end. An 75 student stands 2m from support 1.
A potential difference of 87mV exists between the inner and outer surfaces of the cell membrane. The inner surface is negative relative to outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell.
What is the new frequency of the string that was tightened. find the magnitude of the net force acting on the car during this time.
An unmarked police car travelling a constant 95 km/h is passed by a speeder travelling 145km/h. Precisely 1 s after the speeder passes, the police officer steps on the accelerator.
what is the final position of the man. What is the magnitude of the electric field (in N/C) at the point (-2.0 m, 3.0 m).
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