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A rocket fires two engines simultaneously. One produces a thrust of 725 N directly forward while the other gives a thrust of 513 N at an angle 32.4^\circ above the forward direction. Find the magnitude of the resultant force which these engines exert on the rocket.
A nickel has a mass of about 5 grams. If all of this mass could be converted to energy, how many Hiroshima sized bombs would this be
Two heavy pendula of mass m are suspended from strings of length l inside a railroad car of mass M that can roll freely on horizontal tracks (ignore the moment of inertia of the wheels).
At t=0, the displacement x(0) of a block attached to a spring is -850 cm. The block's velocity v(0) is then -.920m/s, what is the abgular frequency of this system
A 800- kg car collides with a 1500- kg car that was initially at rest at the origin of an x-y coordinate system. What was the initial speed of the lighter car
A typical Major League fastball is thrown at about 99 mph and with a spin rate of 103 rpm. If the distance between the pitcher's point of release and the catcher's glove is exactly 65.5 ft, how many full turns does the ball make between release and c..
A thin rod of length 0.75 m and mass 0.35 kg is suspended freely from one end. It is pulled to one side and then allowed to swing like a pendulum, Find the rod's kinetic energy at its lowest position
A person on a rotating stool with arms stretched out rotates at an angular speed of 5.00 rad/s. By what factor does the moment of inertia change
Two spherical objects have a combined mass of 190 kg. The gravitational attraction between them is 8.26×10?6 N when their centers are 17.0 cm apart. What is the mass of the heavier object
A simple model considers a continent as a block (density ? 2800 kg/m3), estimate the height of the continent above the surrounding mantle rock
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 60.7 degrees. Find the the angle the resultant force makes with dog A's rope
A starship is exploring a new star system. The ship is a light-minutes away from the star, which has a radius of 106km. The intensity at the location of the starship is 240 W/m^2.
a block with mass M rests on a frienctionless surface and is connected to a horizontal spring force k. Find the maximum amplitude of oscillation such that the top block will not slip on the bottom block
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