If you push on a cart on a railroad with a force of 500 N and it doesn't move, you can conclude that a. the cart has too much mass to accelerate
b. the force is canceled by the reaction force.
c. there is a force of 500 N in the opposite direction acting on the cart.
d. the normal force is greater than 500 N.
e. Newton's second law is not valid in such a frame of reference.

Two thin 80.0- cm rods are oriented at right angles to each other. each rod has one end at the origin of the coordinates, and one of them extends along the x- axis while the other extends along the yaxis. the rod along the x- axis carries a charge of - 15.0 μ c distributed uniformly along its length, and the other rod carries 15.0 μ c uniformly over its length. find the magnitude and direction of the net electrical force that these two rods exert on an electron located at the point (40.0 cm, 40.0 cm). (e

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

How to tell if two objects are in thermal equilibrium 1.the objects have the same temperature 2.the objects are the same size 3.the objects are touching each other 4.the objects temperatures are changing