Which of the following describes the acceleration of an object with constant velocity? a) Negative acceleration
b) Positive acceleration
c) Not enough acceleration to tell
d) No acceleration

Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be

What is the function of the commutator in a dc motor? a. to spin the magnet b. to change direct current into alternating current c. to change alternating current into direct current d. to spin the wire coil

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e