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A 1.00 kg block Is resting against a light, compressed spring at the bottom of a rough plane inclined at an angle of 30 degrees. Kinetic friction between box and plane is 0.100. Suppose the spring is compressed 10 cm from its equilibrium length. The spring is then released and the block separates from the spring and slides up the incline a distance 2.00 cm beyond spring normal lenth. What is the mechanical energy of system and the spring constant k?
On a frictionless, horizontal air table, puck A (with mass 0.150kg} ) is moving toward puck B (with mass 0.350kg} ), which is initially at rest. After the collision, puck A has a velocity of 0.120m/s to the left, and puck B has a velocity of 0.650..
Find the kinetic energy of a 3.70{\rm kg} cat that has 0.240 kg *m/s}} of momentum. Find the momentum of a 1.22{\rm kg} ball that has 16.0 J} of kinetic energy.
Two figure skaters, one weighing 625N and the other 775N , push off against each other on very smooth ice. If the heavier skater travels at 1.60m/s , how fast will the lighter one travel?
A charge of +2?C and 6 mg is fired directly upward at a speed of 500 m/s. The charge reaches the top of its trajectory at 30 m. Ignoring gravity, find the magnitude and direction of the electric field necessary to accomplish this.
In an EM wave traveling west, the B field oscillates vertically and has a frequency of 84.0 kHz and an rms strength of 6.30×10^?9T.
A 4.3 kg rock is initially at rest at the top of a cliff. Assume that the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water. The specific heat of water is 4186 J/kg·?
The tire on a bicycle is filled with air to a gauge pressure of 691 kPa at 20?C. What is the gauge pressure in the tire after a ride on a hot day when the tire air temperature is 48?C?
Consider a grounded conducting sphere of radius "a" in the presence of a point charge "Q" a distance "D" away from the center of the sphere. How do you show the electric field E is everywhere normal of the sphere, and how do you find the induced char..
Now imagine that the coil is subjected to a series of experiments, that we will label 1, 2, etc., for clarity. At the beginning of both experiments 1 and 2, the magnetic field is initially 3.0 T.
Air at 70 degrees Celsius and atmospheric pressure flows with a velocity of 22 fps through a 3-in diameter pipe (e=0.00015 in). Find the friction head loss in 75 ft of pipe.
Air at 25 oC blows over a heated steel plate with its surface maintained at 200 oC. Calculate the heat loss per hour from the top surface of the plate
A disc of mass M and radius R is rolling purely without slipping with velocity V on a flat horizontal floor. When it hits a step in the floor of height R/2.what is the velocity of the center of mass of the disc just after impact.
A box slides down a 22° ramp with an acceleration of .92m/s2. Determine out the coefficient of kinetic friction between the box and the ramp.
An electron of kinetic energy 35 keV moves in a circular orbit perpendicular to a magnetic field of 0.390 T. Find the radius of the orbit
A particle that has an 8.3-?C charge moves with a velocity of magnitude 4 × 105 m/s along the +x axis. Find the magnitude and direction of the magnetic field
A plane accelerates from rest at a constant rate of 5.00m/s^2 along a runway that is 1800m long. What is the distance traveled by the plane in the last second before taking off
A diver is planning to salvage a Spanish galleon located in 200 feet of water. He plans to use a diving suit that will be supplied with air from a hose. Calculate which compressor should be bought by the diver for the given condition
A radio station is allowed to broadcast at an average power not to exceed 26 kW. estimate how many kilometers away you might be able to hear this station
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
A vertical straight wire carrying an upward 30?Acurrent exerts an attractive force per unit length of 5.5×10?4N/m, What current (magnitude) flows in the second wire
The damage caused by electric shock depends on the current flowing through the body; 1 mA can be felt and 5 mA is painful. What is the minimum voltage placed across the arms that would produce a current that could be felt by a person with dry skin
The front end of an automobile has been designed so that upon impact it progressively crumples by as much as .70m. What is the magnitude of the deceleration
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