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A 200-g block is pressed against a spring of force constant 1.40 kN/m until the block compresses the spring 10.0 cm. The spring rests at the bottom of a ramp inclined at 60.0° to the horizontal. Using energy considerations, determine how far up the incline the block moves before it stops (a) if the ramp exerts no friction force on the block and (b) if the coefficient of kinetic friction is 0.400.
A gas molecule having a speed of 322 m/s collides elastically with another molecule of the same mass, which is initially at rest. Find the speed of each molecule after collision
An athlete at the gym holds a 1.2 kg steel ball in his hand. His arm is 64 cm long and has a mass of 4.0 kg. Evaluate the magnitude of the torque about his shoulder if he holds his arm straight, but 30 degrees below horizontal?
A physics professor is pushed up a ramp inclined upward at an angle 33.0^\circ above the horizontal as he sits in his desk chair that slides on frictionless rollers. The combined mass of the professor and chair is 82.0 kg.
Two microscope slides are placed one on top the other. They are in contact at one end but a hair separates them at the other end. What is the thickness of the hair
A projectile is fired at 50.0 o above the horizontal. Its initial speed is equal to 107.5 m/s. What is the maximum height reached by the projectile
It is found experimentally that the electric field in a certain region of Earth's atmosphere is directed vertically down. At a certain location, Find the net amount of charge contained in a cube
A man with mass m1 = 56 kg stands at the left end of a uniform boat with mass m2 = 179 kg and a length L = 3 m. What is the location of the center of mass of the system
A physics book slides off a horizontal table top with a speedof 1.15 m/s. It strikes the floor in0.500 s. Find the height of the table top above the floor in meters
the radius of curvature of the cornea is typically 7.7 mm. if we construct a lens with this radius of curvature on one
Two lenses, one converging with a focal length of 20.0cm and one diverging with a focal length of -12.0cm, Find the final image from the second lens. Follow the sign conventions
A baseball is thrown with an inital velocity of 20 m/s along the horizontal axis and 15 m/s along the vertixal axis. The ball soon reaches the highest point, what is the speed at that point? (ignore air friction) I know the answer is 20 m/s, just nee..
The reel has radius R and moment of inertia I. One end of the block of mass m is connected to a spring of force constant k, and the other end is fastened to a cord wrapped around the reel. The reel axle and the incline are frictionless. The reel i..
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