As a protest against the umpire's calls, a baseball pitcher throws a ball straight up into the air at a speed of 23.0 m/s. in the process, he moves his hand through a distance of 1.10 m. if the ball has a mass of 0.150 kg, find the force he exerts on the ball to give it this upward speed.

42.44 N

Explanation:

F = m g + m a


average speed in hand = (23 + 0)/2 = 11.5 m/s


time in hand = 1.1 m / 11.5m/s = 0.097seconds



a = change in speed / time in hand

= 23/0.097 = 273.11 m/s^2



F = 0.15 (9.8 + 273.11) = 42.44 N

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.

yup its correct its: c) b b