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Question1
A dock worker loading crates on a ship finds that a 22 kg crate, at first at rest on a horizontal surface, requires a 69 N horizontal force to set it in motion. Though, after the crate is in motion, a horizontal force of 46 N is required to keep it moving with constant speed.The acceleration of gravity is 9.8 m/s2. Find out the coefficient of static friction between crate and floor and discover coefficient of kinetic friction.
Question2
A friend of yours is loudly singing a single note at 380Hz while racing toward you at 26.2m/s on a day when speed of sound is 339Hz. What frequency do you listen to? What frequency does your friend hear if you suddenly begin singing at 380Hz?
Question3
An FCC film is deposited on (100) plane of a single-crystal FCC substrate. It is determined that an angle between [100] directions in the film and substrate is 63.4°. What are Miller indices of the plane dishonest in the film surface?
A rock is thrown off a bridge of height 75m. at an angle theta=25 degrees with respect to the horizontal. The initial speed of the rock is 15 m/s. compute the maximum height reached by the rock?
A person pulls a toboggan for a distance of 39.7 m along the snow with a rope directed 33.0 ° above the snow. How much work is done on the toboggan by the tension force
A 59.0 kg skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of the circle with a radius of 3.80 m.
A 5.06 10-5 H solenoid is constructed by wrapping 63 turns of wire around a cylinder with a cross-sectional area of 9.70 10-4 m2 , Determine the change in the length of the solenoid
How many revolutions does the ball make during its fall. Now assume that the ramp is frictionless, so that the ball slides instead of rolling. Through what horizontal distance d does the ball move before landing in this case.
A ball and bat, approaching one another each with the same speed of 1.1 m/s collide. Find the speed of the ball after the collision. find the factor by which the kinetic energy of the ball increases
When a person is given intravenous fluid, the bag containing the fluid is typically held about 0.9 m above the person's body. what is the pressure in the person's blood
A hotel elevator ascends 170 {rm m} with a maximum speed of 5.90 {rm m/s}. Its acceleration and deceleration both have the magnitude of 1.3 {rm m/s^2}.
Estimate the average force exerted by a shot-putter on a 7.0-kg shot if the shot is moved through a distance of 2.4m
An object has a kinetic energy of 279 J and a momentum of magnitude 24.3 kg·m/s. Find the speed and the mass of the object
A hydrogen atom in the ground state absorbs a 20 eV photon. What is the speed of the liberated electron
A 950-kg car traveling west at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. Find the speed of the wreckage just after the collision
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