Cart A, of mass m, starts from rest and travels in a straight line with acceleration a. It reaches velocity v in time t. Cart B, of mass 4m, starts from rest and travels in a straight line with acceleration a/2. At time t it has reached velocity .

Iron reacts with sulfur to form iron sulfide. if 60 grams of iron reacts with sulfur to produce 90 grams of iron sulfide, how much sulfur has been used in the chemical reaction?

In physics the desire of an object to keep doing what it is doing is termed?

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33