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The two blocks of masses M and 2M shown to the right initially travel at the same speed v but in opposite directions. They collide and stick together. How much mechanical energy is lost to other forms of energy during the collision?
A 1225 kg automobile starts from rest on a horizontal road and gains a speed of 83 km/h in 38 s. What is the average power required of the car during the 38 s interval
A rock has a narrow crack (width 1.9 mm) into which water can penetrate. When this water freezes, it expands. Calculate the pressure on the rock when the water freezes
A law enforcement officer in an intergalactic "police car" turns on a red flashing light and sees it generate a flash every 1.3 s. How fast is the "police car" moving relative to the earth
What is the kinetic energy of a 0.5-kg object moving at a constant speed of 2 m/s?
A flat coil of wire has an area A, N turns, and a resistance R. It is situated in a magnetic field, such that the normal to the coil is parallel to the magnetic field. The coil is then rotated through an angle of 90?, so that the normal becomes pe..
A particle in a central force field has the orbit r=c*phi^2, where c is a constant. Find the angle as a function of time
A ladder of mass 30 kg and length 5m leans against a frictionless wall. The angle between the ladder and the wall is 37 degree. what is the force between the ladder and the wall
A block of mass 1.00kg slides along a horizontal table with speed V0 = 2.50m/s. How far did the spring compress when the block first momentary comes to rest
Neutron stars are extremely dense objects that are formed from the remnants of supernova explosions. Many rotate very rapidly. Suppose that the mass of a certain spherical neutron star is 1.9 times the mass of the Sun and its radius is 20.9 km.
A photographic image of a building is 0.0920 m high. The image was made with a lens with a focal length of52.0mm. determine the height of the building
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.61 km. What is the direction of the couples displacement
The velocity of the air with respect to the ground is 50.0 m/s at an angle of 30.0 degrees NORTH of EAST. What is the velocity of the airplane
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