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Q. When lifting an object using the biceps muscle, the forearm acts as a lever with the fulcrum at the elbow. The input work is provided by the biceps muscle pulling up on the bone. How much force should the biceps exert to lift an object weighing 12N?
Assume you are 80cm from a plane mirror. What area of the mirror is used to reflect rays entering one eye from a point on the tip of your nose if your pupil diameter is 5.60 mm.
Evaluate the heat loss per meter for each of the combinations you can figure out. Summarize the result in a graphical way, such as a table, such that they are easy to read and understand.
how long does it take the engine to lift the crate a vertical distance of 19.8 m? Friction in the system is negligible.
A scuba diver at a depth of 42.0 m below the surface of the sea off shores of Panama City, where the temperature is 7 °C, releases an air bubble with volume 18 cm3.
A cannon ball is fired horizontally with a velocity of 600 m/s from the top of a cliff 1000 m high.
A uniform magnetic field of magnitude B = 0.020 T is in the positive y-direction. Determine the magnitude and direction of the magnetic force on each segment.
1.76- block at rest on a ramp of height. While the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 12.0 that has a coefficient of kine..
One way to measure on another planet or moon by remote sensing is to measure how long it takes an object to fall a given distance. A lander vehicle on a distant planet records the fact that it takes 3.17 for a ball to fall freely 11.26.
Calculate the smallest coefficient of static friction necessary for mass A to remain stationary.
A new General Electric kitchen stove has a mass of 68kg and the dimensions. The stove comes with a warning that it can tip forward if the person stands or sits on oven door when it is open.
An astronaut's normal weight it 600 newtons. How much would she weigh while orbiting in a satellite at 12,000 kilometers [two earth radii] above the surface of Earth.
The loaded cab of an elevator has a mass of 2.8 x 10^3 kg and moves 214 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab.
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