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the power output of a cyclist moving at a constant speed of 48 ms on a level road is 140 wa what is the force exerted
you shoot a 47-g pebble straight up with a catapult whose spring constant is 310 nm the catapult is initially stretched
the length of a spring increases by69cm from its relaxed length when a mass of17kg is hanging in equilibrium from the
sam pushes a 100-kg sack of bread flour on a frictionless horizontal surface with a constant horizontal force of30n
a spacecraft in the shape of a long cylinder has a length of 100 m and its mass with occupants is 1810 kg it has
a solid uniform sphere and a uniform spherical shell both having the same mass and radius roll without slipping down a
on a frictionless horizontal air table puck a with mass 0250 is moving toward puck b with mass 0350 which is
a typical ten-pound car wheel has a moment of inertia of about 035 kgm2 the wheel rotates about the axle at a constant
a solid uniform ball rolls without slipping up a hill as shown in the figure at the top of the hill it is moving
when the power is turned off on a turntable spinning at 780 rpm you find that it takes 105 revolutions for it to stop
a constant retarding torque of 15 mmiddotn stops a rolling wheel of diameter 050 m in a distance of 21 m how much work
a uniform 10 kg cylinder of radius 010 m is suspended by two strings wrapped around it as the cylinder descends the
a rope goes over a circular pulley with a radius of 75 cm if the pulley makes four revolutions without the rope
a mechanic turns a wrench using a force of 30 n at a distance of 18 cm from the rotation axis the force is
suppose a 15 kg watermelon is hung from a string a bolt with a mass of 30 grams is shot into the watermelon before
a 12 kg wood block is launched up a wooden ramp that is inclined at a 24deg angle the blocks initial speed is 13 ms use
a plane flying horizontally at a speed of 500 ms and at an elevation of 160 m drops a package two seconds later it
an airplane flying directly eastward at a constant rate travels 305 km in 20 ha what is the average velocity of the
if a person of mass m simply moved forward with speed v his kinetic energy would be 12 mv2 however in addition to
a 600-m tall tower casts a 600-m long shadow over a level ground at what angle is the sun elevated above the
an object of mass m 35 kg slides from rest a distance d 6 m down a frictionless inclined plane where it encounters a
a block of mass m 25 kg rests on a frictionless floor it is attached to a spring with a relaxed length l 6 m the
a cart of mass m1 3 kg is attached to a block of mass m2 5 kg by a string that passes over a frictionless pulley the
a heat engine takes in 1000 j of energy at 1000 k and exhausts 615 j at 200 k what are the actual and maximum
a 5 kg block is placed near the top of a frictionless ramp which makes an angle of 30o degrees to the horizontal a