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A proton moves .10m along the direction of an electric field of a magnitude 3.0V/m. What is the change in kinetic energy of the proton?
A bullet of mass 25.0 g is fired into a wooden block of mass 2.200 kg that is initially at rest. what is the speed of the bullet before it impacted the block
A girl with a mass of 60kg springs from a trampoline with an initial upward velocity of 8.0 m/s. what is the maximum height that the girl (with box) reaches
A bicycle has wheels with a diameter of 0.67m. It accelerates uniformly and the rate of rotation of its wheels increases from 191 rpm to 260 rpm in a time of 21.70 s. Find the linear acceleration of the bicycle.
An airplane is flying with a velocity of 99.0m/s at an angle of 26.0° above the horizontal. When the plane is a distance 121m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
starting from rest, a 4.1 kg block slides 2.00 m down a rough 30 degree incline. The coefficient of kinetic friction between the block and the incline is uk= 0.436, determine the work done by the normal force
The system shown above is in equilibrium. The steel block has a mass m1 = 234 kg, What is the tension in the vertical wire that holds the steel block
You measure an electric field of 1.26×106 N/C at a distance of 0.149 m. from a point charge. find the magnitude of the charge
A 30.0g ball of clay traveling east at 1.00m/scollides and sticks together with a 30.0g ball of clay traveling north at 6.00m/s
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.55 m and 1.04 m, respectively. Calculate the speeds of the tips of both rotors
A spacecraft is traveling with a velocity of v0x = 5675 m/salong the +x direction. Two engines are turned on for a time of 847 s. One engine gives the spacecraft an acceleration in the +x direction of ax = 1.25 m/s2,while the other gives it an acc..
In a slow-pitch softball game, a 0.200 kg softball crossed the plate at 18.00 m/s at an angle of 45.0° below the horizontal. Determine the impulse delivered to the ball
A cockroach of mass m lies on the rim of a uniform disk of mass 7.00 m that can rotate freely about its center like a merry-go-round. obtain the angular velocity of the cockroach-disk system
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