A10-kg cart moving at 5 m/s collides with a 5-kg cart at rest and causes it to move 10 m/s. which principle explains the result?
a) law of differential mass
b) law of conservation of momentum
c) law of unequal forces
d) law of accelerated collision

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

How do we measure or think of speed in the united states?

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.