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If you stand next to a wall on a frictionless skateboard and push the wall with the force of 40 N, how hard does the wall push back on you? If your mass is 80 kg, calculate your acceleration.
A solid disk of mass M and radius R is pivoted so that it can rotate about its center. The disk is initially at rest. A ball of mass m and speed v travels along a path tangential to the rim of the disk. The ball sticks to the disk and the assembly..
Assume that there is an announcement of a fantastic process capable of putting the contents of physics library on a very smooth postcard. Will it be readable with an electron microscope? Explain.
The plates of a parallel-plate capacitor each have an area of 0.1 m2 and are separated by a 0.6 mm thick layer of paper. The capacitor is connected to a 13 V battery. (The dielectric constant for paper is 4.)
A proton (mass 1.67 x 10^27kg) is moving at 1.55 x 10^6m/s directly toward a stationary helium nucleus (mass 6.64 x 10^27kg). what is the helium's velocity
A block of mass 6.1 kg rests on a plane inclined at an angle of 28? . The static coefficient of friction between the block and the plane is 0.68. What is the frictional force on the block?
A 6000-kg truck is accelerating at 0.5 m/s2 up a slope of 5 degrees. calculate the driving force needed for the truck to accelerate up the incline
A 0.052 kg mass oscillates on a spring with a frequency of 8.2 Hz and an amplitude of 0.025 m. What is the maximum acceleration during an oscillation
A tennis ball (m=60 gram) traveling at 25 meter per second hits a wall and rebounds with a speed of 22 m/s. Evaluate the impulse given to the ball
A box of mass 3 kg sits on a table. Neglect friction. You pull on a string tied to the right side of the box, exerting a force of 20.0 N at an angle of 30.0 degrees above the horizontal. Calculate the coefficient of friction with the surface
A boat's mast is held by two cables, one attached to the front of the ship and the other to the back. What is the force acting upwards on the mast exerted by the boat at the bottom of the mast
A 55.6-kg ice skater is moving at 4.00 m/s when she grabs the loose end of a rope, Determine the force exerted by the horizontal rope on her arms
In a dentist's office an X-ray of a tooth is taken using X-rays that have a frequency of 6.08 × 1018 Hz. What is the wavelength in vacuum of these X-rays
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