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A hydraulic lift is used to jack a 970 kg car 12 cm off the floor. The diameter of the output piston is 18 cm, and the input force is 250 N.
(a) What is the area of the input piston?
(b) What is the work done in lifting the car 12 cm? Show all work and formulas for best rating.
A 38.00 kg girl is bouncing on a trampoline. All throughout a certain interval after she leaves the surface of trampoline, her kinetic energy decreases to 185J from 425J. How high does she rise all through this interval? Avoid air resistance.
A 2.30-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 3.40sin (2pi*t), where F is in newtons and t is in seconds. The force constant of the spring is 35.0 N/m.
A pendulum consists of a 4.98kg mass on the end of a 0.873 m string. The mass is pulled aside so the string makes an initial angle with the vertical of 12.5o. The mass is then released with initial speed of 2.10m/s upward and perpendicular to the rop..
The maximum speed of a 2.5-kg mass attached to a spring is 0.55 m/s, and the maximum force exerted on the mass is 11 N. What is the amplitude of motion for this mass
A 290 g piece of iron at 180 oC is placed in a 95 g aluminum calorimeter cup containing 250 g of glycerin at 10 oC. What is the specific heat of glycerin
Mercury flows through a horizontal pipe 1.40 cm in diameter and 0.6 m long. what is the rate of flow through the tube
A flight attendant pulls her 70.0N flight bag a distance of 244 m along a level airport floor at a constant speed. The force she exerts is 36N at an angle of 52° above the horizontal. Find the work she does on the flight bag.
Calculate the electrostatic force exerted on the point charge by the cylinder and what level of uncertainty would be acceptable in the initial position? You may assume that the uncertainty in all other parameters is negligible
A photon with an initial wavelength of 1.390Ã-10-11 m Compton scatters from an electron which is initially at rest. compute the kinetic energy of the scattered electron
Calculate the angular momentum of the Earth about its own axis, due to its daily rotation. Assume that the Earth is a uniform sphere
Four point charges have the same magnitude of 7.60 *10^-12 C and are fixed to the corners of a square that is 2.0 cm on a side. Determine the magnitude of the net electric field that exists at the center of the square
A molecule of DNA (deoxyribonucleic acid) is 2.08 µm long. The ends of the molecule become singly ionized: negative on one end, Determine the effective spring constant of the molecule
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