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A student standing on a stationary skateboard tosses a textbook with a mass of mb = 1.55 kg to a friend standing in front of him. The student and the skateboard have a combined mass of mc = 127 kg and the book leaves his hand at a velocity of 3.6 m/s at an angle of 33° with respect to the horizontal. Part (a) Write an expression for the magnitude of the velocity of the student, vs, after throwing the book. Part (b) Solve for the magnitude of the velocity of the student, vs in m/s?
Two 330 kg (733 lb) masses are separated by a distance of 4 m. Using Newton's law of gravitation, find the magnitude of the gravitational force exerted by one mass on the other
A simple pendulum, 2.0 m in length, is released with a push when the support string is at an angle of 25° from the vertical. what is its speed at the bottom of the swing
The absorber surface of a solar collector is made of aluminum coated with black chrome a s = 0.87 and e ir = 0.09). Solar radiation is incident on the surface at the rate of 600 W/m2. The air and the effective sky temperature are 25 and 15°C respe..
A coil has an inductance of 0.45 H and a resistance of 42 ohms. The coil is connected to a 5.6 V ideal battery. At what rate is the energy being dissipated
Calculate the total angular momentum of our Moon relative to the center of the Earth. You may assume that the Moon is a uniform sphere
A machine gun fires 25-g bullets at the rate of 4 bullets per second. What is the average recoil force experienced by the machine gun
q1. a ball is thrown directly up from the ground with speed vsub0. at the same time a second ball is dropped from rest
A charged line extends from y = 2.50 cm to y = -2.50 cm. The total charge distributed uniformly along the line is -8.50 nC. Find the magnitude of the electric field on the x-axis at x = 10.0 cm
Three equal point charges, each with charge 1.35 mu C, are located at the vertices of an equilateral triangle whose sides are of length 0.60m. What is an electric potential energy U of the system? (Take as zero the potential energy of the three ch..
You walk 40m to the North then turn 50 degrees to your right and then walk another 30m. How far are you from where you originally started
a cylindrical steam boiler shell is of riveted construction. it is made from plates 18mm thick and has a diameter of
A highway patrolman sends a 24.150-GHz radar beam towards a speeding car. The reflected wave is lower in frequency by 4.04-kHZ
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