Please help me with these, but please show your work so I can understand. 3o. A

Question

Please help me with these, but please show your work so I can understand.

3o. A ball is tired horizontally from a launcher that is 1.32 m above the ioor. ine range o shot is 2.35 m. The speed of firing is closest to a. 0.5 m/s b. 0.7 m/s e, 2.5 m/s d. 4.5 m/s e. 7.4 m/s A ball is fired from a launcher with an initial speed of 8.0 m/s at an angle of 40.0° above the horizontal. The point of firing is 1.32 m above the floor. 37. The horizontal component of the ball's initial velocity is closest to: a. 3.50 m/s b. 4.91 m/s c. 5.14 m/s d. 6.13 m/s e. 7.23 m/s 38. The vertical component of the ball's initial velocity is closest to: a. 3.50 m/s b. 4.91 m/s c. 5.14m/s d. 6.13 m/s e. 7.23 m/s 39. The predicted range of this shot is closest to: a. 3.35 m b. 3.65 m c. 4.85 m d. 5.98 m e. 7.74 m 40. The experimentally measured range for a quantity is 2.85 m, and the theoretically pred value for the same quantity is 3.41 m. Using the theoretical value as the reference valu relative difference between these two values is closest to: a, 4% b. 8% c. 12% d. 16% e, 20%

Explanation / Answer

37)(d)6.13 m/s

explanation:

vix = v cos(theta) = 8 x cos40 = 6.13 m/s

38(c)5.14 m/s

explanation:

viy = v sin(theta) = 8 x sin40 = 5.14 m/s

39)(e)7.73 m

R = sqrt (2v^2/g (h + v^2/2g)

R = sqrt (2 x 8^2/9.81 (1.32 + 8^2/(2 x 9.81)) = 7.73 m

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