Why do you think a compass needle always points north? (Write your initial ideas. It is OK if you are unsure about them.)

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)