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A crate, mass = 60 kg, is pulled along a horizontal surface with a coefficient of kinetic friction ?= 0. 2 by a rope which makes an angle of 53 degrees with the horizontal. The tension in the rope is 400 N. What is the acceleration of the crate?
The speed of sound in air at room temperature is 340 m/s. What is the frequency of a sound wave in air with wavelength 1.3 m
Many communications satellites orbit the earth in geostationary orbits. (They appear to remain in the same positions in the sky for observers on the earth's surface.) If such a satellite orbits at a height of 40,000 km, estimation the time delay in a..
A double-slit apparatus consists of two of slits separated by 0.25 mm with a screen 5.0 cm away. Calculate the wavelength of the light
A 3.92 m long rod has mass 1.04 kg which is uniformly distributed along the rod. what is the magnitude of the angular acceleration of the rod
An 18-year-old runner can complete a 10.0 km course with an average speed of 4.38 m/s. A 50-year-old runner can cover the same distance with an average speed of 3.88 m/s. How much later (in seconds) should the younger runner start in order to fini..
A 1600 kg car drives around a flat 210m -diameter circular track at 25m/s. What is the magnitude of the net force on the car
A bowling ball weighing 71.6 is attached to the ceiling by a rope of length 3.71 . The ball is pulled to one side and released, What is the acceleration of the bowling ball
A 250 g block of wood hangs from a light string 0.78 m long. The block is shot with a bullet of mass 4.2 g, what was the velocity of the bullet just before it hit the block
A uniformly accelerated car passes three equally spaced traffic signs. The signs are separated by a distance d = 20 m. What is the magnitude of the acceleration of the car
convert 25mus into ams bmihthe kinetic energy of a car of mass m moving with velocity vis emv22. if m1000kg and v6ms
A car of mass 2200 kg collides with a truck of mass 4800 kg, and just after the collision the car and truck slide along, stuck together. The car's velocity just before the collision was m/s, and the truck's velocity just before the collision was..
A certain copper power line carries a current of 52.7 A, and its resistance per unit length is 1.15 10-5 /m. If a bird is standing on this line with its feet 4.0 cm apart,
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