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A 750.0 kg boulder is raised from a quarry 125 m deep by a long uniform chain having a mass of 575 kg. What is the max acceleration the boulder can have
A 75 kg skydiver can be modeled as a rectangular box withdimensions of 20cm x 40 cm x 180 cm. What is the terminal speed if he falls feet first
A boy ties a small stone to one end of a string and holding the other end, he whirls the stone above his head in a horizontal circle. If the stone has a mass of 0.5 kg, find the centripetal force on
Two point charges totaling 7.50 µC exert a repulsive force of 0.250 N on one another when separated by 0.619 m. What is the charge on each if the force is attractive
A 9800 kg boxcar traveling at 19 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 13 m/s
A novice skier, starting from rest, slides down a frictionless 33.0° incline whose vertical height is 128 m. How fast is she going when she reaches the bottom
A box of mass 5.4 kg is accelerated from rest by a force across a floor at a rate of 2.0 m/s2 for 9.0 s. Find the net work done on the box
A soot particle, originally neutral, gets charged in a process that removes 27 electrons. Find its resulting charge
The driver of a motorboat that can move at 10 m/s wishes to travel directly across a narrow strait in which the current flows at 5 m/s. At what angle upstream should the driver head the boat
A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. Find the smallest value for the angle , such that the lower end of the board does not s
If the hydrogen atoms undergoes a transition between these states, it emits a photon with a characteristic wavelength of 21 cm. What is the energy difference between the 2 states
Two masses are connected by a light string passing over a light, frictionless pulley, Determine the speed of each object when the two pass each other
A charged object moving with a velocity v = 210 m/s passes through a magnetic field of B = 0.70 T that is oriented at an angle of 350 relative to the velocity. what is the magnitude of the charge on
A 4.5 %u03BCF capacitor initially has a charge magnitude Q = 2.0 x 10-8 C. What is the total energy stored in the capacitor
A 10. kg blocks rests on a table (on Earth) and 0.50 is the coefficient of static friction. what is the maximum horizontal pull that will not move the block
A boy is on a Ferris wheel, which takes him in a vertical circle of radius 5.5 m once every 21.0 s. What is the angular speed of the Ferris wheel
A block is pushed up a 20.0 (degrees) frictionless incline with an initial speed 12.0 m/s. How much time does it take to return to its starting position
A 37.8 kg box initially at rest is pushed 5.27 m along a rough, horizontal floor with a constant applied horizontal force of 81.3836 N. Find the work done by the friction
In a physics demonstration, two rubber balls are dropped down a tube towards the ground,with the lighter ball behind, How high does the light ball rise after the two collisions
A marble moving 1.48 m/s rolls off the top edge of a 125. cm high table. How far from the base of the table did it strike the floor
A high diver of mass 80.0 kg jumps off a board 10.0 m above the water. what average upward force did the water exert on him
A 16.8 kg block is dragged over a rough, horizontal surface by a constant force of 123 N acting at an angle of angle 34.9 above the horizontal. Find the magnitude of the work done by the force of fr
A tuning fork with a frequency of 440Hz is held just above the top of a uniform glass tube containing water, What is the speed of sound in air
A long straight ideal solenoid of radius 6 cm, with 150 turns/m passes (on axis) through the center of a flat circular coil, What is the total flux across the coil, as a function of time
A boy catches - with bare hands and his arm extended - a 0.16 kg baseball coming directly toward him ar a speed of 25 m/s. what is the average force the boy's hand feel while catching the ball