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A rock is thrown horizontally with a speed of 20 m/s from a vertical cliff of height 27 m.
(a) How long does it take to reach the horizontal ground below?
(b) How far will it land from the base of the cliff?
(c) What is the velocity (magnitude and direction counterclockwise from the +x-axis, which is the initial horizontal direction in which the rock was thrown) of the rock just before it hits the ground?
An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. This moon takes 19.0 days on average to complete one nearly circular revolution around the unnamed planet.
a lightning flash is seen in the sky and 8.2seconds later the boom of the thunder is heard . The temperature of the air is 12 degrees celcius. how far away is the lightning strike
a test charge of +3x10-7 C is located 5cm to the right of a charge of -4x10-6 C and 10 cm to the left of a charge of -1x10-6 C.the three charges lie on a straight line. find the force on the test charge
On an icy (nearly frictionless) street a 600 kg car traveling straight east at 5 m/s collides with a 1000 kg car traveling straight north at 3 m/s. what is the direction of motion of the second car
a small aircraft is headed due south with a speed of 57.8 m/s with respect to still air. Determine the directional angle is relative to due south
A 1.00 liter bubble of air at the bottom of the Marianas Trench has an inital temperature of about 0C. what is the volume of the bubble as it breaks the surface
a?1000 kg aircraft going?25 ms collides with a?1500 kg aircraft that is parked. they stick together after the collision
A car drives horizontally off a 86m -high cliff at a speed of 29m/s . Ignore air resistance. How long will it take the car to hit the ground
A highway curve with radius 950{\rm ft} is to be banked so that a car traveling 48.0{\rm mph} will not skid sideways even in the absence of friction. At what angle should the curve be banked?
assume a construction worker bangs his hammer on average 1100 times a day. how many stress cycles would this produce in
A cork on the surface of a pond bobs up and down two times per second on ripples having a wavelength of 7.70 cm. If the cork is 13.5 m from shore, how long does it take a ripple passing the cork to reach the shore? _____s
In the figure, two masses, each 24 kg, are at rest and connected by the pulley. the pulley is massless and frictionless. Use Energy and work to find. a) the speed of the masses after thay have moved 1.6 m assumming the surface is frictionless.
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