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A bullet of mass 7.00 g is fired horizontally into a wooden block of mass 1.15 kg resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.250. The bullet remains embedded in the block, which is observed to slide a distance 0.270 m along the surface before stopping.
What was the initial speed of the bullet?
In an American football game, a 90.4 kilogram fullback running east with a speed of 5.07 m/s is tackled by a 94.0 kilogram opponent running north with a speed of 2.99 m/s. Obtain the mechanical energy lost as a result of the collision
A block with mass mA = 15.0kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass mB = 4.5kg which hangs vertically. Determine the magnitude of the acceleration of the system
How does the magnitude of electrical force between a pair of charged objects changed when the objects are moved twice as far apart? Three times as far apart?
An automobile of mass 1500Kg moving at 25.0 m/s collides with a truck of mass 4500 kg at rest. What is the final velocity of the car and truck just after the collision
A 21g particle is moving to the left at 29 m/s. How much work must be done on the particle to cause it to move to the right at 41 m/s.
A man stands on the roof of a building of height 15.7m and throws a rock with a velocity of magnitude 26.3m/s at an angle of 25.0o above the horizontal. Calculate the maximum height above the roof reached by the rock
A girl delivering newspapers covers her route by traveling 10.00 blocks west, 4.00 blocks north, and then 2.00 blocks east. What is the total distance she travels
A 2.00 meter long wire loops carrying a current of 2.00 A is in the shape of an equilateral triangle. determine the maximum torque that acts on it
200 g of lead (c=128 j/kg*K) at 100 degree (=100 C) are placed in a container filled with 200g of water (c=4190 j/kg*K) at 20 degree (= 20 C). How much Heat is exchanged with the environment
an electron in the hydrogen atom is in an excited state given by n4 l3 ml2 ms12. list the possible final states the
The figure shows two 22.7 kg ice luges that are at rest and placed a short distance apart, one directly behind the other. What are the final speeds of the first luge
An outside loudspeaker (considered a small source) emits soundwaves with a power output of 90 W. Find the intensity level in decibels at that distance
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