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A uniform 1.3 kg rod that is 0.8 m long is suspended at rest from ceiling by two springs, one at each end of the rod. Both springs hang straight down from the ceiling.
find the ratio of vb to vr, where vr is defined above and vb is the boats speed with respect to the water.
Tim and Rick both can run at a constant speed Vr and walk at the constant speed Vw, (Vw
A helicopter is ascending vertically with a speed of 5.20m/s. at a high of 125m above the earth, a package i dropped from a window. How much time does it take for the package to reach the ground? (Hint: the package's initial speed equals helicopte..
Four point charges have the same magnitude of 2.18 x10-12 C and are fixed to the corners of a square that is 3.95 cm on a side. Three of the charges are positive and one is negative. find the magnitude of the net electric field that exists at the ..
find static friction between the chair and the floor.
A 0.27 kg rock is thrown perpendicularly upward from the top of the cliff that is 32 m high. When it hits the ground at the base of cliff, the rock has a speed of 29 m/s. suppose that air resistance can be ignored, find out A) initial speed of the ro..
A wire of length L = 15 is bent into a semi circle . If the total charge on the wire is -45nC, determine the electric field at the center point of the semicirlce.
Two cylinders of the same material and length, are held horizontally one atop the other with space in between so they are not touching.. Viewed from the end they look like two circles on top of each other with space between(looks like a lower case..
Imagine that we drop a block of mass m from a height h above the comparatively lightweight plate supported by a vertical spring with relaxed length L and spring constant k. From what value of h would we have to drop the block to compress spring to..
A 94 g stone is whirled in a horizontal circle on the end of a 73 cm long string. The stone takes 1.10 s to make each complete revolution. Conclude the angle that the string makes with the horizontal.
What would be apparent speed of the spacecraft image
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