Question

The following data is obtained from a computer simulation for a patted baseball with mass 0.145 kg including air resistance. Find the work done by the air on the base ball as it moved from maximum height to back to its position

t (s)	x(m)	y(m)	vx(ms-1)	vy(ms-1)
0	0	0	30	40
3.05	70.2	53.6	18.6	0
6.59	124.4	0	12.0	-30

• A. 0
• B. 106.56 J
• C. 76 J
• D. 213 J

Answer 1

Answer: (B)

106.56 J

Answer 2

W = $\frac { 1 } { 2 }$m

= $\frac { 1 } { 2 }$ × 1.45(30² + 40² – 12² - 30²) = 106.56 J