A.3 kg toy rocket was launched with a velocity of 3m/s. How much potential energy would it have at the moment it reaches its maximum height? Use the following formulas.
(KE = 1/2 mv2), (PE=mxgxh), (Total energy = PE+KE)
0 2.7 j
1.35 j
20J
0
O
10 j

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

Which magnetic property best describes a magnet’s ability to act at a distance? magnets are dipolar. magnets attract only certain objects. magnets have magnetic fields. magnets can transfer their properties to certain materials.