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A 300 Kg boat is initially moving at a constant velocity.Suddenly, the boat feels a force due to the wind which is directed45 degrees north of east and has a magnitude of 100 N. After 10seconds, the boat is moving at 5 m/s in a direction 30 degreesnorth of east. What was the initial velocity vector of the boat?(Specify magnitude and direction).
A wooden plank is raised at one end to make an angle of 30° to horizontal. determine the rate of acceleration down the incline
A potter's wheel-a thick stone disk of radius 0.500 m and mass 125 kg-is freely rotating at 50.0 rev/min. Find the effective coefficient of kinetic friction between the wheel and rag
Doug pushes a 4.60 kg crate up a 1.70-m-high 20 ^\circ frictionless slope by pushing it with a constant horizontal force of 28.0 N.What is the speed of the crate as it reaches the top of the slope?
A 9.10 kg board is wedged into a corner and held by a spring at a 50° angle, as the Illustrating shows. The spring has a spring constant of 196 N/m and is parallel to the floor.
Two 30 kg masses have velocities (in m/s) of vector v 1 = 10 i(hat) - 20 j(hat), Determine the velocity of the center of mass of the system
What is the equilibrium temperature of this system? The average specific heat of aluminum over this temperature range is 653 J/(kg*K), determine the amount of water that has frozen
You wish to design a velocity selector that will allow protons to pass through only if they have a speed of 500 m/s, You decide to produce this electric field using a parallel-plate capacitor with a plate spacing of 1.0 mm. What is the electric pote..
A hunter aims directly at a target (on thesame level) 130 m away. If the bullet leaves the gun at aspeed of 290 m/s, by how much will it miss the target
Suppose a monatomic ideal gas is contained within a verticalcylinder that is fitted with a movable piston. The piston isfrictionless and has a negligible mass. Through what distance does the piston drop
Let's say that you have a mass of 45.0 kg, and that you run up a staircase as fast as you can, taking a time of 2.40 s to you raise yourself through a height of 3.00 meters. What is your power output during this process
a 2.95 block on a horizontal floor is attached to a horizontal spring that is initially compressed 0.0380 . the spring
One solenoid is centered inside another. The outer one has a length of 55.0cm and contains 6800 coils, Find the emf induced in the inner solenoid
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