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a230-mw laser beam of diameter185mm is reflected at normal incidence by a perfectly reflecting mirror calculate the
a uniform plank of length 400 m and weight 350 n rests horizontally on two supports with 100 m of the plank hanging
a projectile is launched on an unnamed planet the projectiles vertical position is yt -5t2 15t 50a sketch yt vs tb
what weight of water is displaced by a 100-ton floating ship what is the buoyant force that acts on the
a 9500-pf capacitor holds plus and minus charges of 165 x 10-8 what is the voltage across the
an electron starts from rest 325 cm from a fixed point charge with q-0125 microc how fast will the electron be moving
ip suppose a planet is discovered that has the same amount of mass in a given volume as the earth but has radius 16 r
in a physics laboratory experiment a coil with 220 turns enclosing an area of 126 cm2 is rotated in a time interval of
a proton is released in a uniform electric field and it experiences an electric force of 738times1014 toward the south
a projectile is launched vertically from the surface of the moon with an initial speed of 1100ms at what altitude is
an object moves with constant acceleration 400 ms2 and over a time interval reaches a final velocity of 120 msa if its
two blocks are connected by a light but sturdy string wrapped around a mass-less pulley the rough inclined surface
a box of unknown mass is sliding with an initial speed vi 590 ms across a horizontal frictionless warehouse floor when
a pilot takes off from a city in northern california and aims her airplane due north toward seattle with a speed 240
an object with total mass mtotal 145 kg is sitting at rest when it explodes into three pieces one piece with mass m1
in a fast-pitch softball game the pitcher is impressive to watch as she delivers a pitch by rapidly whirling her arm
calculate the electric field at the center of a square 525 cm on a side if one corner is occuppied by a 450 uc charge
the differential gear of a car axle allows the wheel on the left side of a car to rotate at a different angular speed
a man drags a 780-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the
a solid circular disk has a mass of 12 kg and a radius of 018 m each of three identical thin rods has a mass of 015 kg
the plates of a parallel-plate capacitor have a separation of 200mm and each has an area of 142cm2 each plate carries
a small space telescope at the end of a teather line of length l moves at liner speed v about a central space stationa
rolled a sphere hollow and non-hollow cylinder down an inclined slopea what experimental problems would arise if they
a 50 kg uniform disc with a radius 15 is accelerated from rest to angular speed 35 rads how much work is required to
jamal pulls a 150-n sled up a 280deg degree slope at constant speed by a force of 100 n near the top of the hill he