Physics, 03.02.2021 20:50 vistagallosky
An object with mass m is suspended at rest from a spring with a spring constant of 576 N/m.
The length of the spring is 15.6 cm longer than its unstretched length L when an object is
added. A person then exerts a force on the object and stretches the spring an additional 17.9
cm. What is the total energy stored in the spring at the new stretched length?
Answers: 1
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Physics, 22.06.2019 06:30
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Physics, 22.06.2019 20:20
The base of a 50-meter tower is at the origin; the base of a 50-meter tree is at (0, 50, 0). the ground is flat and the z-axis points upward. the following parametric equations describe the motion of six projectiles each launched at time t = 0 in seconds. (i) r (t) = (50 + t2)k (ii) r (t) = 2t2 j + 2t2k (iii) r (t) = 50 i + 50 j + (50 β t2)k (iv) r (t) = 2t j + (50 β t2)k (v) r (t) = (50 β 2t) i + 2t j + (50 β t)k (vi) r (t) = t i + t j + tk (a) which projectile is launched from the top of the tower and goes downward? at time t = , the projectile hits the ground at point (x, y, z) = . (b) which projectile hits the top of the tree?
Answers: 2
An object with mass m is suspended at rest from a spring with a spring constant of 576 N/m.
The len...
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