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The mass Tom's whole leg (i.e. thigh, lower leg, and foot) is 12 kg. Tom's leg angularly accelerates 50 rad/s2 around the hip joint in the transverse plane during a roundhouse kick. The radius of gyration of the leg around the axis of rotation for this kick is 0.18 m.
(a) How large is the torque that produces this acceleration?
(b) If the moment arm for this group of muscles is 0.05 m, how much muscle force is required to produce this movement?
A 300 gram block is attached to a light horizontal spring. The block is free to slide on a horizontal table. Find how far beyond its equilibrium position will the spring stretch at its first maximum extension if the coefficient of kinetic friction o..
In the series RLC circuit which consists of a 150-ohm resistor, a 1.27x10^-6 F capacitor, and a 0.035 H inductor, 60.0Hz power supply. What is the phase angle between the current and the voltage?
Given the mass of the rubber in the balloon is 1.40 gram, determine the net vertical force on the balloon if it is let go? You can ignore the volume of the rubber
What is the process of increasing the internal energy of a system called?
A string with a length of 0.5 meters is vibrating with a frequency of 100 Hz and it forms a standing wave at the fundamental mode with a velocity of 100 m/s. What is the new frequency of vibration on the sting
Two people carry a heavy electric motor by placing it on a light board 2.60 m long. What is the weight of the motor?
Water enters a horizontal nozzle with diameters d1 and d2 at 10 m=s and exits to the atmosphere. Estimate the pressure upstream of the nozzle.
A certain projectile is launched with an initial speed v0. At its highest point its speed is v0/6. What was the launch angle
given the following vectors a is 25lbs at an angle of 30 degrees clockwise from the x-axis and b is 42lbs at an angle
A lightbulb operates at a power of 60 watts when connected to a potential difference of 120 volts. In this condition, how many electrons are passing though it per second
An 8 g bullet traveling at 340 m/s is shot into a 0.7 kg block of wood suspended from the ceiling by a 2.5 m long light rope. What is the speed of the block of wood just after the bullet embeds itself
A 45-kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 25 degrees , At what angle does the crate begin to slide
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