What do the gravitational force and the electric force have in common? A The force in each case depends on the inverse of the square of the distance separating the objects.

B Friction can cause objects to acquire both electric charge and mass.

C They are both approximately the same strength.

D The force in each case is capable of attracting or repelling.

E Gravity depends on charge. The electric force depends on mass.

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c.the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors

What is part of a line has one endpoint and continues in one direction?