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Sonic the Hedgehog weighs 5kg and is falling from a height of 50 m onto a spring which will be compressed 1m before launching him back to his original height. What is Sonic's kinetic energy at 25 m while ascending?
Assume the orbital of a lunched satellite around the earth is circular. Show that there is only one speed that a satellite can have if the satellite is to remain in an orbit with a fixed radius and it does not depend on the mass of the satellite.
38.6g ball of clay is thrown horizontally to the right at 14.4m/s toward a 1.50kg block sitting at rest on a frictionless surface. The clay hits and sticks to the block. What impulse does the clay exert on the block
The wave travels in the positive x-direction and has a displacement of zero at t = 0 and x = 0. How many complete oscillations has the wave made at t = 20.0 s and x = 4.2 m?
a magicians trick involves charging a 50 kg box with 2 x 10-3 c of charge then charging a platform with the same
The force constant of a spring is 800 N/m and the unscratched length is 0.63 m. A 4.6 kg block is suspended from the spring. An external force slowly pulls the block down, until the spring has been stretched to a length of 0.76 m.
a bullet is fired through a board 14.0 cm thick with its line of motion perpendicular to the face of the board. if it
Sand moves without slipping at v = 5.9 m/s down a conveyer that is tilted at θ = 15o. The sand enters a pipe h = 3.4 m below the end of the conveyer belt, as shown in the figure below. What is the horizontal distance d between the conveyer belt an..
A student throws a baseball at a large gong 61 m away and hears the sound of the gong 1.5404 s later. The speed of sound in air is 330 m/s. What was the average speed of the baseball on its way to the gong
A college student produces about 127 kcal of heat per hour onthe average. What is the rate of energy production in watts? How many kilocalories of heat does the operation of a 1195 Whair dryer produce each second?
A 0.840 millimeter diameter silver wire carries a 50 mA current. Determine the electron drift speed in the wire
An object of mass 2 kg is moving on a spring with a frequency of 120 Hz and an amplitude of 1.5 m. What is the objects maximum velocity
A glass rod rubbed with silk acquires a charge of +1.1×10?9 . Is the charge on the silk positive, zero, or negative, How much mass has the glass rod gained or lost
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