Two objects are being lifted by a machine. One object has a mass of 2 kg, and is lifted at a speed of 2 m/s. The other has a mass of 4 kg and is lifted at a rate of 3 m/s. A. Which object has more kinetic energy while it is being lifted?

B. What does this tell you about the variable(s) that impact kinetic energy?

C. Which object had more potential energy when it was lifted a distance of 10 m?

D. What does this tell you about the variable(s) that impact gravitational potential energy?

Suppose you plot the distance traveled by an object at various times and you discover that the graph is not a straight line. what does this indicate about the object's acceleration?

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.

The chart shows daniela’s run through her race. what is her velocity? 1.5 m/s 2 m/s 2.5 m/s 5 m/s