a duck has a mass of 2.90kg. as the duck paddles, a force of 0.250 N in a direction of 55.0° south of east. When these forces begin to act, the velocity of the duck is 0.150 m/s in a direction due east. Find (a) the magnitude and (b) the direction (relative to die east) of the displacement that the duck undergoes in 2.10 s while the forces are acting. (Note that the angle will be negative in the south of east direction.)

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

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.

How to know which equation of motion to use where?explain