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A 50-kg student on a sled starts from rest at a vertical height of 20 m above the horizontal base of a hill and slides down.
A Cessna aircraft has a lift-off speed of 132 km/h. What minimum constant acceleration does this require if the air craft is to be airborne after a take-off run of 215m?
A 0.500-kg ball is thrown vertically upward with an initial speed of 10.0 m/s. If the initial potential energy is taken as zero, find the ball's
A 1200-kg automobile travels at a speed of 12 m/s.
A fun-loving 11.4 {rm kg} otter slides up a hill and then back down to the same place. If she starts up at 5.75 {rm m/s} and returns at 3.75 {rm m/s}, how much mechanical energy did she lose on the
The thermos under the professor's lectern, sneak out of the room, and await the inevitable explosion. After a few seconds have passed, what is the pressure inside the thermos?
A 2 kg ball of clay traveling west at 10 m/s collides with a 1 kg ball of clay traveling north at 5 m/s. What is the speed of the resulting ball of clay? Assume that the collision is perfectly inel
wire carries a steady current of 2.60 A. A straight section of the wire is 0.750 m long and lies along the x axis within a uniform magnetic field, = 2.00 T. If the current is in the positive x dire
A superhero flies 171 m from the top of a tall building at an angle of 31 degrees below the horizontal. What is the horizontal component of the superhero's displacement?
A 30 kg block runs into a spring with spring constant of 400 N/m and compresses it. When the compression of the spring is 50 cm the speed of the block is 2 m/s. What was the speed of the block just
Demonstrate the tremendous acceleration of a top fuel drag racer, you attempt to run your car into the back of a dragster that is "burning out" at the red light.
A simple pendulum is made from a 0.632-m-long string and a small ball attached to its free end. The ball is pulled to one side through a small angle and then released from rest. After the ball is r
A horse races once around a circular track in a time of 118s, with a speed of 17 m/s. What is the radius of the track? How do you go about solving this?
f1=20.0n 30 degrees , f2 =40.0n 191 degrees using the component method of vectors addition, calculate the resultant force on the car. give your answer in polar form.
George of the Jungle, with mass m, swings on a light vine hanging from a stationary tree branch. A second vine of equal length hangs from the same point, and a gorilla of larger mass M swings in the
A 500 g ball moves in a vertical circle on a 50 cm-long string. When the string is horizontal the speed of the ball is 8 m/s. What is the speed of the ball at the highest point?
Determine the minimum gauge pressure needed in the water pipe leading into a building if water is to come out of a faucet on the twelfth floor, 62.2 m above that pipe.
At this new distance, the speed of the block is observed to be 3.00 m/s. What is the tension in the cord in the original situation when the block has speed v_0 = 0.90 m/s?
Explain how insulators become electrically polarized despite the "zero mobility" of both types of charge carrier. Include a conceptual sketch showing the location of protons.
Jupiter has a radius r= 7.14*104km, and the acceleration duo to gravity at the surface is gj = 22.9 m/s2. use these data to calculate Jupiter's average density.
A block of mass m slides along a horizontal friction- less track with speed vm. It collides with a stationary block of mass M. Find an expression for the mini- mum value of vm that will allow the s
The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell?
Two skaters, A and B, of equal mass are moving in clockwise uniform circular motion on the ice. Their motions have equal periods, but the radius of skater A's circle is half that of skater B's circ
A 28.0 m steel wire and a 23.0 m copper wire, both with 1.00 mm diameters, are connected end to end and are stretched to a tension of 130 N. How long does it take a transverse wave to travel the en
The Garfield Thomas water tunnel at Pennsylvania State University has a circular cross-section that constricts from a diameter of 3.6 m to the test section, which is 1.2 m in diameter. If the speed