When an object is between the focal point and a concave mirror, so is negative. What other values must be negative for your equations to still work?

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?