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The deltoid muscle connects the shoulder blade to the upper arm (humerus), and so contraction of the deltoid raises the arm. The deltoid tendon connects the humerus 15.0 cm from the shoulder joint at an angle of 20.0° with the horizontal. Suppose the arm weighs 39.5 N and its center of gravity is 36.4 cm from the shoulder joint. A weight W is held in the outstretched hand 90.0 cm from the shoulder joint.
a) Find the force the shoulder joint exerts on the humerus if W = 36.5 N. (Assume the +x direction is to the right.) _________N
b) What is the angle of the force on the shoulder joint above the horizontal? _________degrees
From the top of a cliff, a person uses a slingshot to fire a pebble straight downward, which is the negative direction. The initial speed of the pebble is 8.10 m/s. how far beneath the cliff top is the pebble
a partice moves along the path y=-0.090x^6(-7)meters with a constant speed of 4 m/s. assume dx/dt>_0. Determine the cartisian components of velocity and acceleration at x= - 2m
question1a hockey pucks b rests on a smooth ice surface and is struck by a second puck a which was initially travelling
An open railroad car of mass 2404 kg is coasting with an initial speed of 18 m/s on a frictionless, horizontal track. How much water (in kilograms) has accumulated in the car
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The largest apple pie ever made was rectangular in shape and had an area of 7m× 12m. Consider a parallel-plate capacitor with this area. Imagine that the capacitor is filled with air and the distance between the plates is 1mm. a.
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A child is trying to throw a ball over a fence. She gives the ball an initial speed of 8.0 m/s at an angle of 40° above the horizontal. How far is the child from the fence
Car A uses tires for which the coefficient of static friction is 1.1 on a particular unbanked curve. The maximum speed at which the car can negotiate this curve is 25 m/s. Car B uses tires for which the coefficient of static friction is 0.65 on the s..
A massless rod of length 1m has a 2.00 kg mass attached to one end and a 3 kg mass attached to the other. The system rotates about a fixed axis perpendicular to the rod that passes through the rod 30.0 cm from the end with the 3kg mass attached. The ..
A 3.42 g plastic bead charged to -3.61 nC and a 6.84 g glass bead charged to +7.22 nC are 5.26 cm apart, What is the acceleration (in m/s/s) of the plastic bead
A box of mass 5.8 kg is accelerated from rest by the force across a floor at a rate of 2.0 m/s2 for 8.2 s. Find the net work done on the box.
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