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Two balls hit in an elastic collision. Both balls initially have the same speed but opposite directions (before the collision), and one ball is 2 times more massive than the other. What is the velocity of both balls after they collide?
an electric dipole consists of 1.30g spheres charged to -1.90nc at the ends of a 8.00cm -long massless rod. the dipole
A ball is released from the top of a cliff; it hits the ground 1.1 seconds later. how many meters is the cliff above the ground below
A 80-kg driver can decrease his rotation rate in a flip from an initial rate of 3.0rev/s to a final rate of 1 rev in 2 sec by straightening his body. find his final moment of inertia, then find his initial moment of inertia
a tow truck is pulling a car out of a ditch by means of a steel cable y 2.0 x 1011 nm2 that is 8.87 m long and has a
A rotating fan completes 1200 revolutions every minute. Consider the tip of a blade, at a radius of 0.11 m. Through what distance does the tip move in one revolution? What is the tip's speed
The charge is uniformly distributed within volume of each sphere.How much kinetic energy does the block gain.
consider a merry-go-round in the shape of a uniform disc of mass 400 kg and radius 3 m. two children each of mass 20 kg
A 1.40 kg block slides with a speed of 0.950 m/s on a frictionless horizontal surface until it encounters a spring with a force constant of 734N/m. The block comes to rest after compressing the spring 4.15 cm.
An airtight box has a removable lid of area 2.46 × 10-2 m2 and negligible weight. find the magnitude of the force required to pull the lid off the box
A mortar crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. How long will the mortar shell remain in the air
a current carrying wire of length 0.5m is at the equator. assuming that the magnetic field of the earth has a magnitude
In order to study the long-term effects of weightlessness, astronauts in space must be weighed (or at least "massed"). Find the mass of the astronaut
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