Please show the equations to use and all the steps. Thank you! 7-1 As a protest
ID: 1576098 • Letter: P
Question
Please show the equations to use and all the steps. Thank you!
7-1 As a protest against the umpire's calls, a baseball pitcher throws a ball 5 pts straight up into the air at a speed of 22.2 m/s. In the process, he moves his hand through a distance of 1.52 m. If the ball as a mass of 0.156 kg, find the force he exerts on the ball to give it this upward speed. N(±0.2N) Source: Serway and Faughn, College Physics, 6th edition, Problem 456 7-2 Assume that the three blocks in the figure move on a frictionless surface. In 5 pts the figure, mi-0.91 kg, m"2= 1.81 kg, and m; = 2.81 kg. 42.1 N in The 42.1-N force acts as shown on the right block. (a) Determine the acceleration of the blocks. m/s2 ( ± 0.02 m/s) (b) Determine the tension in the cord connecting the left and right blocks. N(±0.2N) c) Determine the force exerted on the center block by the left block N(±0.2 N)Explanation / Answer
Given
mass of the ball m = 0.156 kg ,
velocity is v = 22.2 m/s
distance s = 1.52 m
the force exerted on the ball is
W = 0.5*m(v2^2-v1^2)+m*g(h)
F*s = 0.5*0.156(22.2^2-0^2)+0.156*9.8*1.52 J
F = 40.765296 /(1.52) N
F = 26.82 N
so the force exerted on the ball is 26.82 N