A frictional force acts against an object sliding along the ground. If this object weighs 76 kg and the magnitude of the friction force is 300N, what

is the coefficient of kinetic friction

Every

minute, 7 C of charge flows through this cross section of the copper wire.

What

is wire’s current?

Two

children fight over a 5 kg toy. Child1 pulls to the right with a force of 12.4 N, and child2 pulls to the left with a force of 2.1 N.  No other forces are involved.  Determine the magnitude of the toy’s

resulting acceleration(in m/s

A person is rearranging furniture. They begin to move an initially stationary bookshelf. If the bookshelf has a mass of 4.4 kg, and the person pushes it with a net force of magnitude 15.4 N; Which of the following is the speed(in m/s) of the bookshelf after the 2.3 s interval?

In a triangular arrangement of three-point masses: 

m_B=2 kg

m_C=3 kg

m_A=4 kg

Rank in order, from smallest to largest, the magnitudes of the

electric field at the black dot:

Four objects move with the velocity-versus-time graphs shown. Which

object has the largest displacement between