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An 3kg body is fastened to a weightless rod 3meters long to form apendulum. What is the increase in the potential energy of the body when it is pulled aside until the rod makes an angle of500with the vertical?
A 4.40 kg ball is dropped from a height of 14.0m above one end of a uniform bar that pivots at its center. The bar has mass 7.50kg, How high will the other ball go after collision
a jet engine suspended beneath the wing of an airplane. The weight of the engine is 11800 N, find the magnitude of the torque due to the weight
A 150kg uniform board 8m long is supported by two posts: one 1m from the left and the other 2m from the right. Find the forces on the supports
The rear window of a van is coated with a layer of ice at 0°C. The density of ice is 917 kg/m3, What is the maximum thickness of ice above this area that the defroster can melt in 2.7 minutes
A mass spectrometer applies a voltage of 2 kV to accelerate a singly charged positive ion. A magnetic field of B = 0.400 T then bends the ion into a circular path of radius 0.305m. What is the mass of the ion.
A 1000 kg sports car accelerates from rest to 25.0m/s in 7.5s. What is the average power output of the automobile engine
batteries are rated in terms of ampere-hours a middot h. for example a battery that can produce a current of 2.00 a for
If the pressure of the 3.0-cm3 volume is reduced to 2.6 × 10?11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
a 13-kg ball moving at 24 ms collides elastically and head-on with a second 5-kg ball moving in the opposite direction
A 18.0 kg block is dragged over a rough, horizontal surface by a constant force of 77.6 N acting at an angle of 35? above the horizontal. The block is displaced 10.8 m, and the coefficient of kinetic friction is 0.149.
A proton (mass 1.67*10 ^-27 kg) is moving at 1.40*10 ^-6 m/s directly toward a stationary helium nucleus (mass 6.64*10 ^-27 kg), After a head-on elastic collision, what is the helium's velocity
A car of mass 1054 kg moves NE at 20.12 m/s, and collides with another car of mass 1233 kg moving 27.72 m/s at 20.0° E of S. find The velocity of the heavier car after the collision
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