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Three uniform spheres of masses m1 = 2.50 kilogram, m2 = 4.00 kilogram, and m3 = 8.00 kilogram are located at the corners of a right triangle. Find the resultant gravitational force on the object of mass m2, assuming the spheres are isolated from the rest of the Universe.
Rocky's base metabolic rate is 100 W (when not exercising). He weighs 80 kg. This morning, he climbed stairs 25-cm high at the rate of 140 steps per minute for 30 minutes on a Stairmaster. How much energy did he burn (in J and in kWh)
A irregular piece of metal has a dry mass of 5.7 kg. Once it is submerged it has an apparent mass of 2.4 kg. What is the density of the piece of metal
A coin with a diameter of 2.30 centimeter is dropped on edge onto a horizontal surface. compute how far does the coin roll before coming to rest
A 4.8 m diameter merry-go-round is rotating freely with an angular velocity of 0.725 rad/s. Its total moment of inertia is 1565kg*m2. Four people standing on the ground, every of mass61.8 kg, abruptly step onto the edge of the merry-go-round.
An astronaut travels to a star system 4.5 ly away at a speed of 0.9c. Suppose that the time needed to accelerate and decelerate is negligible. The journey take according to Mission Control on earth takes 5 years. And the journey takes2.2 years accord..
a 5.5 -thick layer of oil n1.46 is sandwiched between a 1.3 -thick sheet of glass and a 2.3 -thick sheet of polystyrene
A 2,500-kg car moving east at 10.0 m/s collides with a 3,000-kg car moving north. Find the speed of the 3,000-kg car before the collision
A hydraulic jack is made with a small piston 1.2 cm in diameter that is used to move a large piston 5.2 cm in diameter. how heavy a load can he lift with the jack
A 1500 kg mass is lowered 200 m and as it is lowered it runs a generator which lights a 100 watt light bulb.how long does the light bulb stay lit
Starting from rest, a 92-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 840 N, How far did he slide down the pole
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 6.59 m and, in starting, what is the magnitude of the astronaut's linear speed
There is a tree in the middle of your front yard and you take pictures of a squirrell as it runs around the tree. What is the displacement of the squirrell between the rst and second pictures
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