Acceleration due to gravity as on earth
A rotating cylinder about 16 {rm km} long and 7.4 km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it will experience the same acceleration due to gravity as on Earth?
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Compute the potential energy stored in the bow, if the arrow of mass 4.75 10-2 kg leaves the bow with a speed of 20.0 m/s. Assume that mechanical energy is conserved.
A diesel engine does not use spark plugs to ignite the fuel and air in the cylinders. Instead, the temperature required to ignite the fuel occurs because the pistons compress the air in the cylinders.
A constant torque of 22.0 N·m is applied to a grindstone whose moment of inertia is 0.130 kg·m2. Using energy principles, and neglecting friction, find the angular speed after the grindstone has made 17.5 revolutions.
A crankshaft with a diameter of 3.0 , rotating at 2400 comes to a halt in 1.90 .What is the tangential acceleration of a point on the surface of the crankshaft?
A second ball is thrown at an angle of 30.3° with the horizontal. At what speed must the second ball be thrown so that it reaches the same height as the one thrown vertically?
What is the least amount of time it takes for the bob to swing from a position of maximum displacement to the equilibrium position of the pendulum?
A uniform pole 6 m long and weighing 150 N is supported by a boy 1 m from one end and a man 1.5 m from the other end. At what point must a weight of 450 N be attached so that the man supports twice as much as the boy?
A 13 g bullet traveling 213 m/s penetrates a 2.0 kg block of wood and emerges going 152 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?
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