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Suppose your lab partner has a height L of 170 cm (5 ft, 7 in) and a weight w of 680 N (153 lb). You can determine the position of his center of gravity by having him stretch out on a uniform board supported at one end by a scale, as shown in the figure. If the board's weight wb is 49 N and the scale reading F is 3.81 102 N, find the distance of your lab partner's center of gravity from the left end of the board.
A small rocket to gather weather data is launched straight up. Several seconds into the flight, its velocity is 120 m/s, What is the net force on the rocket
A 43kg block of ice slides down the frictionless incline 1.50m long and 0.82m high. A worker pushes up against the ice, parallel to the incline, so that the block slides down at constant speed.
what will be the induced emf magnitude in the short coil. A 77.9 kg fireman slides down a 4.13 m pole by applying a frictional force of 343 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground.
If 3.15×10-4 J of work are required to move 17.7? C of charge from one point to another, what is the electric potential difference between the two points
What is the number of conduction electrons. A centrifuge rotor has a moment of inertia of 3.40 x10-2 kg·m2. How much energy is required to bring it from rest to 8000 rpm.
A reasonable estimate of the moment of inertia of an ice skater spinning with her arms at her sides can be made by modeling most of her body as a uniform cylinder. Estimate the skater's moment of inertia to two significant figures
A toy cannon uses a spring to project a 5.23 g soft rubber ball. The spring is originally compressed by 4.90 cm and has a force constant of 8.04 N/m. At what point does the ball have maximum speed
An air mass has a temperature of 68F at 970hPa with a mixing ratio of 5 g kg-1. Without any condensation or mixing the air mass now has a temperature of 50F and a pressure of 750hPa.
An object 2.01 cm high is placed 40.2 cm to the left of a converging lens having a focal length of 30.5 cm. A diverging lens with a focal length of ?20.0 cm is placed 110 cm to the right of the converging lens.
An asteroid orbits the Sun at a constant distance of 4.080e+11 meters. What is the orbital speed of the asteroid
A ferromagnetic metal at very low temperatures has a specific heat capacity given by c(T)= zT+yT^3+zT^(3/2). find the entropy increase due to this process
A tennis player receives a shot with the ball (0.060 0 kg) traveling horizontally at 50.5 m/s and returns the shot with the ball traveling horizontally, What is the impulse delivered to the ball by the tennis racquet
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