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A bullet of mass 10.1 g is fired into an initially stationary block and comes to rest in the block. The block, of mass 1.15 kg, is subject to no horizontal external forces during the collision with the bullet. After the collision, the block is observed to move at a speed of 4.90 m/s.
(a) Find the initial speed of the bullet.
(b) How much kinetic energy is lost?
A nonconducting thin layer carries charge with a uniform density of 8.40 µC/cm2. (a) What is the electric field 3.80 cm in front of the wall if 3.80 cm is small compared with the dimensions of the wall? magnitude and direction?
A 69-kg lumberjack stands at one end of a 409-kg floating log, as shown in the figure. Both the log and the lumberjack are at rest initially. calculate the lumberjacks speed relative to the shore
In order better to map the surface features of the Moon, Calculate the satellite\'s kinetic energy, gravitational potential energy, and total orbital energy
A thin rod with length L has a linear density that varies as D = dm/dx = Ax, Calculate the moment of inertia of the rod for an axis at the left end, perpendicular to the rod. Compare your result to that of a uniform rod
A 280-g block on a 52 cm long string swings in a circle on a horizontal, frictionless table at 95 rpm. What is the speed of the block.
A car (m = 1610 kg) is parked on a road that rises 17° above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?
The Earth is constantly being bombarded by cosmic rays, which consist mostly of protons. what is the total charge incident on the atmosphere
A circular loop of wire of radius 12.5 cm is placed in a magnetic field directed perpendicular to the plane of the loop, calculate the magnitude of the emf induced in the loop
An atomic spectrum contains a line with a wavelength centered at 450nm, Estimate the lifetime of the excited state
how much time passes before the brick lands on the ground. If the wind speed is 26 mph, find the velocity of the plane in still air.
A 17 kg girl slides down a playground slide that is 3.1 m high. When she reaches the bottom of the slide, her speed is 1.3 m/s. what is the coefficient of friction between the girl and the slide
A plane is headed east with an air speed of 205.0 m/s. The wind blows southeast at 32.0 m/s. Determine the velocity of the plane relative to the earth.
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