30 POINTS
which of the following describes newton's first law of motion?
A) Force is equal to mass of an object multiplied by its acceleration (F=m*a)
B) An object at rest stays at rest unless acted upon by an outside force
C) For every action, there is an equal and opposite reaction

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work