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a 400-n crate starting at rest slides down a rough 600-m-long ramp inclined at 300deg with the horizontal the magnitude
an 250 kg air hockey puck is tied to a peg the puck is given a push and moves around the peg at a constant speed in a
the punter on a football team tries to kick a football so that it stays in the air for a long hang time if the ball is
a skateboarder starting from rest rolls down a 122-m ramp when she arrives at the bottom of the ramp her speed is 861
as measured in earths frame of reference two planets are 425times105 km apart a spaceship flies from one planet to the
astronaut benny travels to vega the fifth brightest star in the night sky leaving his 350-year-old twin sister jenny
as a spaceship flies past with speed v you observe that 10000s elapses on the ships clock in the same time that
an electron with mass 911times10-31 kg moves with a speed of 210times106 ms in a circle of 294 cm radius under the
a stone with a mass of 95 g is being whirled in a horizontal circle on the end of a string that is 85 cm long the
a 1200-kg cannon shoots a 28-kg shell at an angle of 25deg above the horizontal and a speed of 470 ms what is the
a spring with a force constant of 585 nm is compressed a distance of 40 cmfind the resulting increase in the springs
two capacitors when connected in parallel give an equivalent capacitance of 900 pf and give an equivalent capacitance
when the power is turned off on a turntable spinning at 78 rpm you find that it takes 105 revolutions for it to stop
a constant 60-n net force acts for 40 s on a 12 kg object what is the objects change of
a hardworking ant must supply 00500 n to pull a small piece of fruit at constant velocity over a distance of 800 cm up
a 02-kg ball is bounced against a wall it hits the wall with a speed of 20 ms at a 10 degree angle and rebounds
a point charge of 840 mc is surrounded by an equipotential surface with a radius of 0262 m what is the electric
a duck is swimming down a river and passes a slow moving log if the duck is moving 250 times faster than the log but
a trap door of length and width 155 m is held open at an angle of 650deg with respect to the floor a rope is attached
a stone used to grind wheat into flour is turned through 12 revolutions by a constant force of 217 n applied to the rim
a sphere of copper is subjected to 1469 mpa of pressure the copper has a bulk modulus of 130 gpaby what fraction does
a bowling ball made for a child has two thirds the radius of an adult bowling ball they are made of the same material
a solid sphere is released from rest and allowed to roll down a board that has one end resting on the floor and is
a weightlifter bench-presses a 1300 kg barbell from his chest to a height equal the length of his arms 0850 m how much