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a model rocket with mass 167kg starts from rest on the ground and accelerates upward with engine force 468n from
two dogs pull horizontally on ropes attached to a post the angle between the ropes is 690 dog a exerts a force of 250
a worker pushed a 650-kg block 100 m along a level floor at a constant speed with a force directed 390deg below the
during an eclipse the sun earth and moon are arranged in roughly a straight line there are two types of eclipse a lunar
you support one end of a stick of mass m and length l with the tip of your finger a quarter of the way up the stick
a roller coaster reaches the top of the steepest hill with a speed of 40 kmh it then descends the hill which is at an
the coefficient of kinetic friction for a 21 -kg bobsled on a track is 010 what force is required to push it down a 60
two points in a rectangular coordinate system have the coordinates 46 29 and 34 47 where the units are centimeters
a 190 -kg box is released on a 37 incline and accelerates down the incline at 030 ms2a find the friction force impeding
a solenoid 270 cm long and with a cross-sectional area of 0510cm2 contains 410 turns of wire and carries a current of
a rifle with a weight of 30 n fires a 30 g bullet with a speed of 210 msa find the recoil speed of the riflemsb if a
the diameter of a sphere is measured to be 694 ina find the radius of the sphere in centimetersb find the surface area
an object is placed 13 cm in front of a converging lens with a focal length of 1 cm carefully draw a ray diagram on a
an object is fired at 300 ms at an angle of 350 degrees from a vertical cliff that is h meters where h is unknown
a freight train has a mass of 15 times 107 kg if the locomotive can exert a constant pull of 79 times 105 n how long
a uniforn electric field with a magnitude of 420nc pointing in the positive x- direction acts on an electron which is
you are standing on a sheet of ice that covers the football stadium parking lot in buffalo there is negligible friction
the position vectorr in meters of a particle moving in the x-y plane is giving by the following equation ri2t2-8t
a rifle bullet with a mass of 500g strikes and embeds itself in a block with a mass of 1995kg that rests on a
a uniform electric field of magnitude 435 nc pointing in the positive x-direction acts on an electron which is
a car travels around an unbanked highway curve radius 15 km at a constant speed of 25 ms what is the magnitude of the
a spherical capacitor contains a charge of 340nc when connected to a potential difference of 250v if its plates are
what is the acceleration of a projectile when it reaches its highest point what is its acceleration just before and
a projectile is shot from the edge of a vertical cliff 600 m above the ocean it has a speed of 100 ms and is fired at
in a circus act a 60 kg clown is shot from a cannon with an initial velocity of 14 ms at some unknown angle above the