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A 35.0-g bullet strikes a 4.3-kg stationary piece of lumber and embeds itself in the wood. The piece of lumber and bullet fly off together at 7.6 m/s. What was the original speed of the bullet?
Use Bernoulli's equation to estimate the upward force on an airplane's wing if the average flow speed of air is 192 m/s above the wing and 164 m/s below the wing. The density of the air is 1.5 kg/m
Three equal point charges, each with charge 2.00 , are placed at the vertices of an equilateral triangle whose sides are of length 0.650 . What is the electric potential energy of the system? (Take
What is the minimum height the mirror must have foryou to be able to see the top of the table in the mirror?
A cosmic-ray proton in interstellar space has an energy of 10.0 MeV. What is the magnetic field in that region of space?
A hockey puck moving along the +x axis at 0.46 m/s collides into another puck that is at rest. The pucks have equal mass. The first puck is deflected 38 below the +x axis and moves off at 0.37 m/s.
The proton strikes the negative plate at the same instant that the electron strikes the positive plate. Ignoring the attraction between the two particles, what was the initial speed of the proton?
A 50 g ball traveling at 25.0 m/s is bounced off a brick wall and rebounds at 22.0 m/s. A high speed camera records this event. If the ball is in contact with the wall for 3.50 ms, what is the aver
A bullet is fired horizontally with an initial velocity of 900 m/s at a target located 150 m from the rifle. a. How much time is required for the bullet to reach the target?
Four particles, one at each of the four corners of a square with 4.5-m-long edges, are connected by massless rods. The masses of the particles are m1 = m3 = 5.0 kg and m2 = m4 = 8.0 kg. Find the mom
Consider a closed triangular box resting within a horizontal electric field of magnitude E = 7.40x10^4 N/C, Calculate the electric flux through the vertical rectangular surface of the box. kN·
A baseball is thrown at an angle of 25? relative to the ground at a speed of 28 m/s. The ball is caught 61.2211 m from the thrower. The acceleration due to gravity is 9.81 m/s2 . How long is it in t
A charge -335e is uniformly distributed along a circular arc of radius 6.70 cm, which subtends an angle of 66o. What is the linear charge density along the arc?
It accelerates uniformly and the rate of rotation of its wheels increases from 219 rpm to 265 rpm in a time of 20.1 s. Find the linear acceleration of the bicycle.
A 278-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction
While rearranging a dorm room, a student does 224 J of work moving a desk 2.5 m. What was the magnitude of the applied horizontal force?
A 150- crate, starting from rest, is pulled across a floor with a constant horizontal force of 360 . For the first 11 the floor is frictionless, and for the next 11 the coefficient of friction is 0.
Two stationary point charges of 4.00 nC and 2.00 nC are separated by a distance of 60.0 {rm cm}. An electron is released from rest at a point midway between the charges and moves along the line con
A man pushes a lawn mower on a level lawn with a force to 200 N. If 40% of this force directed horizontally, how much work, in J, is done by the man in pushing the mower 6.0 m?
A simple pendulum has lenght of 2.0m and mass of 0.5kg.It is hanging from the room of a car that is traveling at 5m/s and banking a corner of radius 15m. Calculate the time period of oscillation for
Just as before, you suspend the balls from insulated strings with their centers 3 cm apart. What is the magnitude of the force between them?
He pushes hard enough to get the desk moving and continues pushing with that force for 5.00s. how much work does he do on the desk?
The acceleration of gravity is 9.81 m/s^2. Assuming that air resistance is simply a constant 96 N force on the person during the fall, determine the person's velocity just before hitting the net. An
A 200n roller is suspended freely by cord that passes over a frictionless pulley and is connected to a block that lies on a horizontal plane as shown the coeffiecient of static friction us between
A woman on a 10-speed bicycle travels at 9 m/s relative to the ground as she passes a little boy on a tricycle going in the opposite direction. If the boy is traveling at 1 m/s relative to the groun