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A bicyclist of mass 78 kg putsall his weight on each downward-moving pedal as he pedals up asteep road. Take the diameter of the circle in which the pedalsrotate to be 0.40 m, and determine the magnitude of the maximum torque he exerts.
Nm
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In raising a 6400-N piano with a pulley system, the movers note that, for every 3.0 m of rope pulled down, the piano rises 0.26 m Ideally, find the force required to lift the piano. Express your answer to two significant ...
Question: Tectonic plates are large segments of the earths crust that move slowly. suppose that one such plates has an average speed of v=2.1 cm/ year. a) What distace d, in meters, does the plate move 1.4 seconds at thi ...
Question: An old-fashioned single-play vinyl record rotates on a turntable at 38.0rpm . What are (a) the angular velocity in rad/s and (b) the period of the motion? The response must be typed, single spaced, must be in t ...
Question: A thin, horizontal, 20-cm-diameter copper plate is charged to 4.0 nC . Assume that the electrons are uniformly distributed on the surface a) What is the strength of the electric field 0.1 mm above the center of ...
Question: Part A: The electric potential along the x-axis is V =200x2V, where x is in meters. What is Ex at x =0m? Express your answer as an integer and include the appropriate units. Part B: What is Ex at x =3m? Express ...
Question: A sled and rider, gliding over horizontal, frictionless ice at 5.8 m/s, have a combined mass of 86 kg. The sled then slides over a rough spot in the ice, slowing down to 3.0 m/s. What impulse was delivered to t ...
Question: A soap bubble is essentially a thin film of water surrounded by air. The colors you see in soap bubbles are produced by interference. What visible wavelengths of light are strongly reflected from a 390 {\rm nm} ...
Question: Our sun's 5800 K surface temperature gives a peak wavelength in the middle of the visible spectrum. What is the minimum surface temperature for a star whose emission peaks at some wavelength less than 400 nm? t ...
Question: In this problem, you will apply kinematic equations to a jumping flea. Take the magnitude of free-fall acceleration to be 9.80 m/s2 . Ignore air resistance. How long is the flea in the air from the time it jump ...
A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 80.0 m/s at ground level. The engines then fire, and the rocket accelerates upward at 5.00 m/s^2 until it reaches an ...
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