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Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 79.1 N, Jill pulls with 76.7 N in the northeast direction, and Jane pulls to the southeast with 115 N. (Since the donkey is involved with such uncoordinated people, who can blame it for being stubborn?) Find the magnitude of the net force the people exert on the donkey.
A cylindrical container 1.1 tall contains mercury to a certain depth. The rest of the cylinder is filled with water.If the pressure at the bottom of cylinder is two atmospheres, what is the depth.
Two horizontal forces, 249 N and 165 N, are exerted in opposite directions on a crate. What is the net horizontal force on the create? Be sure to point to the direction of the net force.
A 2.0g metal ball that carries a charge of 10uC is placed into an electric field, what is the electric potential difference between point A and point B
while unloading furniture, a worker slides a heavy box down the ramp on the rope. find the mass of the box
A shop sign weighing 230 N is supported by a uniform 115 N beam as shown in Fig. 9-54. find the vertical forces exerted by the hinge on the beam
A uniform plank of length 6m and weight 211N rests horizontally on two supports, with 1.1 m of the plank hanging over right support. To what distance x can a person who weighs 442N walk on the overhanging part of the plank before it just begins to..
An astronomical telescope uses an eyepiece of power +100.0 D. what are the power of the objective and the magnifcation of the telescope
A lithium-5 nucleus is moving at 1.6 Mm/s when it decays into a proton and an alpha particle. What are the magnitude and direction of the proton's velocity
We pass a laser beam through a double slit. On a screen 18.52 m away, we observe a series of bright lines which are 3.4 mm apart. What is the distance between the two slits
A convex spherical mirror with a radius of curvature of 11.0 cm produces a virtual image one third the size of the real object. Where is the object
When a person is given intravenous fluid, the bag containing the fluid is typically held about 0.9 m above the person's body. what is the pressure in the person's blood
what must be done to increase the velocity of a rocket. Calculate the horizontal force that must be applied to produce an acceleration.
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