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A bullet with a mas of 10 g and an initial velocity of 800m/s penetrates 5 cm into a fixed block of wood before stopping. The average force on the buller by the wood is? A block of mass 4.25 kg hanging from a light string is struck by a projectile of mass 250 g. The projectile sticks to the mass after collision and the two together rises a vertical distance of 12 cm. What is the velocity of the two-mass system immediately after collision? A 5-kg object moving with a velocity of 4m/s colides head on with a 10-kg object moving towards it at -3m/s. If teh 10-kg object stops dead after the collision, what is the approximate coefficient of restitution for this collision?
The pulley is located so that the string makes a 45 degree angle with the beam. The beam is uniform, 5 meters long, and has weight. The professor stands 2 meters from the pivot point and has weight.
Certain fish, such as the Nile fish (Gnathonemus), concentrate charges in their head and tail, thereby producing an electric field in the water around them. find the strength of the magnetic field at the receptor cells
A soccer player 'heads' the size 5 ball deflecting it by 46.0°, and keeps its speed of 15.90 m/s constant. A size 5 ball has a mass of approximately 0.421 kg. What is the magnitude of the impulse which the player must impart to the ball.
A painter weighing 630 N climbs to a height of 5.0 m on a ladder. How much work does it take? What is the increase in the potential energy
Due to a tune-up, the efficiency of an automobile engine increases by 3.50 %. For an input heat of 1260 J, how much more work does the engine produce
Very fine smoke particles are suspended in air. The translational rms speed of a smoke particle is 2.3 x 10-3 m/s, and the temperature is 285 K. Find the mass of a particle.
The electric field midway between two equal but opposite point charges is 730 N/C, What is the magnitude of the charge on each
a +3.0micro Coloumb point charge is placed at the origin, and a +12micro Coloumb is places at the point (2.0m,0), At what point along the x-axis is the electric field zero
At a certain time a particle had a speed of 77 m/s in the positive x direction, and 3.3 s later its speed was 36 m/s in the opposite direction. What was the average acceleration of the particle
A rectangular loop of wire that is 45 cm wide and 13 cm long is placed in a region where the magnetic field is B = 0.2 T, obtain the magnitude of the magnetic flux
In a church choir loft, two parallel walls are 5.70 m apart. The singers stand against the north wall. What width of the north wall can she see
A particle travels 19 times around a 10-cm radius circle in 36 seconds. What is the average speed (in m/s) of the particle
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