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What is the maximum compression of the spring, and at what compression of the spring does the box have its maximum speed?
The area of the piston in the master cylinder is 1.75 cm2, and that of the piston in the brake cylinder is 6.4 cm2. The coefficient of friction between shoe and wheel drum is 0.50. If the wheel has
Kicking the skateboard forward at 8.0 m/s. How fast is Dan going as his feet hit the ground? Dan's mass is 60 kg and the skateboard's mass is 5.0 kg.
What is the smallest angle θ between 15.0degree and 90.0degree at which a standing wave exists on the cord??
If the horizontal component of the Earth's magnetic field at the equator is 30 microTeslas, calculate the ratio of the magnetic force on the proton to the gravitational force on it.
A wooden raft has a mass of 67 kg. When empty it floats in water (density 1000 kg/m3) with 51% of its volume submerged. What mass of sand can be put on the raft without it sinking?
A 67 {rm kg} swimmer climbs onto a Styrofoam block whose density is 160 {rm kg/m^{3}}.If the water level comes right to the top of the Styrofoam, what is the block's volume?
A moon orbits a planet because of the gravitational force between them. Likewise, each body also experiences a tidal force due to gravity. Consider how the magnitude of the tidal force changes as th
What minimum coefficient of kinetic friction is required to bring the crate to a stop over a distance of 8.0m along the lower surface.
The kinetic friction coefficient between the lower block and the flat surface is 0.105. A horizontal force F = 95 N pushes against the upper block, causing it to slide. The friction force between th
What change in current will accompany a decrease in temperature of one degree Celsius (or one kelvin)? Be careful of the sign of your answer. (c) How much current flows through the wire when the tem
A 290 Kg piano slides 4.0 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is .40
Find the diameter of a cylindrical copper wire of the same length (having resistivity 1.70×10^-8 W×m) that would produce the same resistance.
A 20kg mass, released from rest, slides 6 meters down a frictionless plane inclined at an angle of 30 degrees with the horizontal and strikes a spring of spring constant k = 200 N/M.
Sam, whose mass is 80.0 , takes off down a 50.0 high, 12.0 slope on his jet-powered skis. The skis have a thrust of 180N . Sam's speed at the bottom is 36.0m/s. What is the coefficient of kinetic f
The tuning fork creates standing waves in the tube when the total length L is 51.7 cm, 66.2 cm, and 80.7 cm. What is the frequency of the tuning fork? Take the speed of sound in air to be 343 m/s.
=A 0.12 kg block on a horizontal frictionless surface is attached to a spring whose force constant is 570 N/m. The block is pulled from its equilibrium position at x = 0 m to a displacement x = +0.
Suppose that you charged a 4.5 F capacitor with two 2.5 V batteries connected in series. How much charge would be on each plate in the final state?
A staging that weighs 280 N supports two painters, one 350 N and the other 550 N. The reading in the left scale is Fl = 350 N. What is the reading Fr in the right hand scale?
The mass of the earth is 5.98 1024 kg, the mass of the moon is 7.36 1022 kg, and the distance between the centers of the earth and the moon is 3.82 108 m. How far is the center of mass of the earth
A 1000 {rm kg} car moving on a horizontal surface has speed v = 70 {rm km/h} when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.1 {rm m}.
A 2000-kg horizontal beam is supported at each end. A 160-kg load rests a quarter of the way from one end if the beam and 120 kg cargo is 1/3 from the other end. What is the vertical force on each o
Which one of the following best expresses the main idea of the professor's argument?
Two radio antennas are separated by 2.0 m. Both broadcast identical 750 MHz waves. If you walk around the antennas in a circle of radius 10.0 m, how many maxima will you detect?
A cube of ice is taken from the freezer at -8.7^circ C and placed in a 104 g aluminum calorimeter filled with 319 g of water at room temperature of 20.0 ^circ {rm C}. The final situation is observe