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An object acted on by three forces moves with fix velocity. One force acting on the object is in the positive x direction and has a magnitude of 7.7 N; a second force has a magnitude of 4.3 N and points in the negative y direction. Find the magnitude and direction of the third force acting on the object.
N
° (counterclockwise from the +x axis)
A pendulum has a length L = 1.11m. It hangs straight down in a jet plane about to take off as shown by the dotted line, Calculate the magnitude of the plane's acceleration
A 6.2\({\rm ft}\) tall shopper in a department store is 18\({\rm ft}\) from a convex security mirror, What is the mirror's radius of curvature
Calculate the mass of Earth from the period of the moon, T = 27.3 d; its mean orbital radius, rm = 3.84 108 m; and the known value of G
in a little league baseball game the 145 rm g ball enters the strike zone with a speed of 15.0 rm ms. the batter hits
A hunter is standing on flat ground between two verticalcliffs that are directly opposite of each other. He is closerto one cliff than the other. find the distance between the cliffs
A critically damped simple harmonic oscillator starts at the origin at rest, and is subject to an additional force Fext = Fto/t. Find the subsequent motion
Flight to Mars. To send a satellite from Earth to Mars, a rocket must accelerate the satellite until it is in the correct elliptical orbit around the sun. Calculate the time for the satellite's journey
The eyepiece of a compound microscope has a focal length of 2.60 cm , and the objective lens has = 0.760 cm. calculate the distance between the lenses when the microscope is adjusted for a relaxed eye
A 1.25-m-diameter wrecking ball hangs motionless from a 1.75-cm-diameter cable. how much does the cable stretch
Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of 444 m/s in 1.8 seconds, then what is the acceleration and what is the distance that the sled travels?
A lawn mower has a flat, rod-shaped steel blade that rotates about its center. If all of the rotational kinetic energy of the blade could be converted to gravitational potential energy, to what height would the blade rise
An experiment measures the temperature of a 270 substance while steadily supplying heat to it. The results of the experiment show. What are (a) specific heat of the liquid phase and (b) the heat of vaporization.
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