Alight horizontal spring has a spring constant of 138 n/m. a 3.35 kg block is pressed against one end of the spring, compressing the spring 0.123 m. after the block is released, the block moves 0.281 m to the right before coming to rest. the acceleration of gravity is 9.81 m/s 2 . what is the coefficient of kinetic friction between the horizontal surface and the block?

Explanation:

using the law of the conservation of energy:

where K is the spring constant, x is the spring compression, N is the normal force of the block, is the coefficiet of kinetic friction and d is the distance.

Also, by laws of newton, N is calculated by:

N = mg

N = 3.35 kg * 9.81 m/s

N = 32.8635

So, Replacing values on the first equation, we get:

solving for :

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)