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A person is standing on crutches. Assume that the forceexerted on each crutch by the ground is directed along the crutch,as the force vectors in the drawing indicate. If the coefficient ofstatic friction between a crutch and the ground is 0.768, determinethe largest angle MAX that the crutch can have just before it begins toslip on the floor
A camera is supplied with two interchangeable lenses, whose focal lengths are 41.0 and 150.0 mm. What is the height (including sign) of her image on the image sensor
The electric field between the plates of a paper-separated (K-375) capacitor is 8.20×10^4 V/m. estimate the area of each plate
A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.55Hz, Ignoring the mass of the spring, what is the mass m of the fish
a pulley with a rotational inertia of 1.1 multiplied by 10-3 kgmiddotm2 about its axle and a radius of 11 cm is acted
A 2.6kg block slides along a frictionless surface at 2.0m/s . A second block, sliding at a faster 5.0m/s, collides with the first from behind and sticks to it. What was the mass of the second block
How fast would javelin (normally 2.5 m long) have to be going (relative to an observer) to appear 20% shorter? (2 m long)
A distant galaxy is moving away from the earth with a speed that results in each wavelength received on the earth being shifted so that ??= 1.65 ?0
A 5.0 multiplied by 102-newton girl takes 10. seconds to run up two flights of stairs to the landing, a total of 5.0 meters vertically above her starting point. What power does the girl develop during her run.
The point of the needle of a sewing machine moves in SHM along the x-axis with a frequency of 2.5 Hz. Find the acceleration component of the needle at t=0
An alpha particle is a nucleus of helium. It has twice the charge and four times the mass of the proton. When they were very far away from each other, but headed toward directly each other, a proton and an alpha particle each had an initial speed ..
A rocket A moves past a lab B at a speed of .9c. A technician in the lab records 3.5 s for the time of an event that occurs on the rocket. What is the time as reckoned by a person aboard the rocket?
A Galaxy is moving away from us with a speed of 3 x 10^7 m s^-1. What is the frequency of the light we would observe if it is emitted at 6 x 10^14 Hz
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