Joe pushes down the length of the handle of a 10.9 kg lawn spreader. the handle makes an angle of 45.3 ◦ with the horizontal. joe wishes to accelerate the spreader from rest to 1.35 m/s in 1.6 s. what force must joe apply to the handle? answer in units of n

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.