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Q1. One of the most powerful cranes in the world operates in Switzerland. It can slowly raise a load of M = 5000 tonnes to a height of h = 16.0 m (1 tonne = 1000 kg). How much work is done by the crane?
Q2. A car moves from a point located 26.0 m from the origin and at an angle of 35.0 from the x-axis to the point located 57.0 m from the origin and at an angle of 60.0 from the x-axis in 2.52 s. What is the magnitude of the average velocity of the car? A car moves from a point located 26.0 m from the origin and at an angle of 35.0 from the x-axis to a point located 56.0 m from the origin and at an angle of 60.0 from the x-axis in 2.50 s. What is the magnitude of the average velocity of car?
Liquid nitrogen has a boiling point of 77.3 K and a latent heat of vaporization of 2.01 105 J/kg. A 60.0-W electric heating element is immersed in an insulated vessel containing 46.5 L of liquid nitrogen at its boiling point. How various kilograms of..
For the polarisers, assume the incident light is linearly polarized, the transmitted intensity (through both polarisers) is 0.15×I0, and the axis of the second polarizer makes an angle θ=41° with the axis of the first polarizer. What is the angle (in..
A weather vane at first at rest has a moment of inertia of 0.111 kg • m2 about its axis of rotation. A 53.0 g piece of clay is thrown at the vane and sticks to it at a point 19.5 cm from the axis. The initial velocity of the clay is 20.0 m/s, directe..
Standing at a crosswalk, you hear a frequency of 520 Hz from the siren of an approaching police car. After the police car passes, observed frequency of the siren is 455 Hz. Establish the car's speeds from these observations.
The wind blows with a force of 425N north on a sail boat, while the water exerts a force of 325N west on the sailboat. Find out the magnitude and direction of the net external force on the sailboat.
A spring with spring constant 12.5 hangs from the ceiling. A 400 ball is attached to spring and allowed to come to rest. It is after that pulled down 6.80 and released. What is the time constant if the ball's amplitude has decreased to 3.90 after 57...
What is the linear speed of the phonograph needle
Meanwhile, Isaac is piloting his ship in the westward direction, also at 0.89, toward Albert's ship. With what speed does Isaac see Albert's light beam pass his ship.
A 79, 37--long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 13 ball of clay travelling horizontally at 2.6 hits and sticks to the extremely bottom tip of the rod.
Find out an angle of the velocity vector
What is the magnitude of an average acceleration of the ball
While a roofer is working on a roof that slants at 39.0 degrees above the horizontal, he accidentally nudges his 93.0 N toolbox, causing it to start sliding downward, starting from rest.
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