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1. A projectile is fired from ground level at an angle above the horizontal on an airless planet where g = 10.0 m/s2. The initial x and y components of its velocity are 86.6 m/s and 50.0 m/s respectively. How long after firing does it take before the projectile hits the level ground?
A. 5.00 secondsB. 10.00 secondsC.15.00 secondsD. 20.00 seconds
2. A rock is thrown from the roof of a building, with an initial velocity of 10 m/s at an angle of 30o above the horizontal. The rock is observed to strike the ground 43 m from the base of the building. What is the height of the building assuming no air resistance?
3. A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.30, and the coefficient of kinetic friction is 0.20. What horizontal force must be applied to the box to cause it to start sliding along the surface?(Please Show Work/Explain)
an aluminum cup of 95 cm3 capacity is filled with glycerin at 18degc. how much glycerin if any will spill out of the
A hotel elevator ascends 170 {rm m} with a maximum speed of 5.90 {rm m/s}. Its acceleration and deceleration both have the magnitude of 1.3 {rm m/s^2}.
A soap film has an index of refraction of 1.334. How thick (in nm) is the film if one-half of a wavelength of red light (with a vacuum wavelength of 700nm)extends from one surface across the film to the other surface?
Suppose a hockey puck slides down a frictionless ramp with an acceleration of 5.00 m/s2. What's the puck's new acceleration down the ramp
Trucks can be run on energy stored in a rotating flywheel, by an electric motor getting the flywheel up to its top speed of 200 rad/s. One such flywheel is a solid, uniform one cylinder with a mass of 500 kg and a radius of 1 m.
A cannonball is fired horizontally at 200m/s off the top of a 50m tall cliff. how far will the ball land from the cliff bottom
Two identical small insulating balls are suspended by separate 0.22-m threads that are attached to a common point on the ceiling. Each ball has a mass of 8.10 10-4 kg.
a generator at hoover dam can supply 396 mw of electrical power. assume that the turbine and the generator are 83.1
A man runs at a velocity of 4.5 m/s frao 15.0 min. When going up an increasingly steep hill, How far did he run
A resistor with resistance R and a capacitor with capacitance C are connected in series to an AC voltage source. The time-dependent voltage across the capacitor is given by VC(t)=VC0sin wt.
question1the driver of an 1800rm kg car travelling on a horizontal road at 114rm km rm h suddenly applies the brakes.
There is a specific angle of incidence relative to that plane called Brewster's angle at which the light is 100% polarized. This occurs when the angle between the reflected ray and the refracted ray is 90o. At what incident angle is sunlight refle..
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