The gravitational force between mars and an object near its surface is so much lower than the force between an object on earths surface and earth. If a dropped hammers speed increase from 0.0 m/s to 7.5 m/s in 2 seconds, what is the acceleration due to gravitational force on the surface of Mars?

Work = force × a. work b. energy c. distance d. momentum

What is a costume plot? why is it important to a film or theater production?

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".