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During a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 210 J from 440J. How high does she rise during this interval? Neglect air resistance?
Two 1.1 kg masses are 1.5 m apart (center to center) on a frictionless table. Each has + 9.7 mu C of charge. what is the magnitude of one of the masses ?
A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant speed. what can you said about the force applied?
a .100 kg meterstick is supported at its 40.0 cm mark by a string attached to the ceiling. A .700 kg mass hangs vertically from the 5.00 cm mark. A mass is attached at another mark to keep it horizo
A stone with a mass of 0.90 kg is attached to one end of a string 0.80 m long. The string will break if its tension exceeds 500 N. The stone is whirled in a horizontal circle on a frictionless table
1 lightyear (ly) is the distance light travels in 1 year moving at 3 x 108 m/s. How long does the journey take according to the astronaut?
An underwater diver sees the sun 55 degrees above horizontal. How high is the sun above the horizon to a fisherman in a boat above the diver?
A projectile is fired straight upward at 141 m s. How fast is it moving at the instant it reaches the top of its trajectory?
What are the magnitude of (a)the angular velocity (b) the radial acceleration and (c)the tangential acceleration of a spaceship taking a circular turn of radius 3220 km at a speed of 29000km/h.
A 22 kg loudspeaker is suspended 2.4 m below the ceiling by two 3.0 m long cables that angle outward at equal angles. What is the tension in the cables?
A 1.20 brick is sliding along on a rough horizontal surface at 15.0 .If the brick stops in 4.30 , how much mechanical energy is lost?
After the police car passes, the observed frequency of the siren is 472 Hz. Determine the car's speed from these observations. The speed of sound in air is 343 m/s.
A 1300 N crate slides 14 m down ramp that makes an angle of 30 degree with the horizontal. If the crate slides at a constant speed, how much thermal energy is created?
How many kilograms of water at 25 degrees celsius must come to thermal equilibrium with a 3 kilogram gold bar at 99 degrees celsius in order to lower the bar's temperature to 47 degrees celsius?
A charge of 2.65 is held fixed at the origin. A second charge of 2.65 is released from rest at the position. At what distance from the origin does the second charge attain half the speed it will have
An 8.00 g bullet is fired into a 250 g block that is initially at rest at the edge of a table of 1.00 m height. The bullet remains in the block, and after the impact the block lands d = 1.7 m from t
In a physics laboratory experiment, a 6.00kg boox is pushed across a flat table by a horizontal force F. a.) if the box is moving at a constant speed of 0.35m/s and the coefficient of kinetic fricti
An emf is induced in a conducting loop of wire 1.41 m long as its shape is changed from square to circular. Find the average magnitude of the induced emf if the change in shape occurs in 4.16 s, and
The ball rolls off the edge and falls a vertical distance of 2.1m before hitting the floor. what is the angular displacement of the ball while the ball is in the air?
A single proton or electron has a charge of 1.602 × 10-19 coulombs. How many coulombs of protons and electrons are in each penny?
The ambulance driver hears his siren at a frequency of 510 Hz. What is the wavelength of the sound of the ambulance's siren if you are standing at the position of the car?
A reconnaissance plane flies 600 km away from its base at 240 km/h, then flies back to its base at 320 km/h. What is its average speed?
(a) In one case, the block is placed on the spring and not released until it rests stationary on the spring in its equilibrium position. Determine the amount (magnitude only) by which the spring is
Two identical metal balls weighing 490 N each are suspended with their centers 3 meters apart. What is the gravitational force that exists between them?
Two cars a and b are traveling in the same direction with velocities A and B(A>B). when the ca a is at a distance behind car b ,the drive of car a appplies break producing uniform retardation r,