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A 40.9 kilogram weather rocket generates a thrust of 1125 Newton. The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 838 N/m, is anchored to the ground. Initially, before the engine is ignited, the rocket sits at rest on top of the spring. Determine how much is the spring compressed?
an immersion heater used to boil water for a single cup of tea plugs into a 120 v outlet and is rated at 350 w .a what
a child stands on a playground merry-go-round a distance of 1.50 m from the rotation axis. the coefficient of static
A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.666. Find the smallest value for the angle ?, s..
a 40.5-cm-by-40.5-cm checkerboard has a mass of 108.5 g. there are four 23.5-g checkers located on the checkerboard as
a 2.00 kg block is pushed against a spring with negligible mass and force constant k 400 nm compressing it 0.220m.
The generator in a purely inductive AC circuit has an angular frequency of 120 pie rad/s. If change V =220. V and L =0.100 H, evaluate what is the rms current in the circuit
The wheel of an automobile has a mass of 25 kg and a diameter of 67.0 cm. What is the angular momentum of the wheel about its axle when the automobile is traveling at 25 m/s (90 km/h) on a straight road
A block is sent up a frictionless ramp along which an x axis extends upward. The figure below gives the kinetic energy ofthe block as a function of position x; the scale of the figure's vertical axis is set by Ks =34.0 J.
the other car pulls with a force of 872 N at an angle of 24? with respect to the same direction. Illustrate what is the net forward force exerted on the truck in the direction it is headed?
An old-fashioned vinyl record rotates on a turntable at 49rpm . What are the angular speed in rad/s and the period of the motion
A tank holds a layer of oil, of thickness To = 1.43 m, that floats on a layer of syrup of thickness Ts = 0.640 m, What is the index of refraction of the oil
You shoot an arrow into the air. Two seconds later arrow has gone straight upward to a height of 30 meters above its launch point. a) What was the arrow's initial speed? b) How long did it take for the arrow to first reach a height of 15 meters ab..
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