A placekicker kicks a football at an angle of 42.0 ? above the horizontal axis w

ID: 2136903 • Letter: A

Question

A placekicker kicks a football at an angle of 42.0

? above the horizontal

axis with an initial speed of 23.0 m/s. Ignore air resistance.

(5) What is the maximum height that the ball attains?

(A) 10.3 m; (B) 11.2 m; (C) 12.1 m; (D) 13.0 m; (E) 14.9 m.

(6) What is the time of ?ight between kicko? and landing?

(A) 2.05 s; (B) 3.14 s; (C) 4.23 s; (D) 5.32 s; (E) 6.41 s.

(7) What is the range reached by the ball between kicko? and landing?

(A) 25.3 m; (B) 41.4 m; (C) 34.5 m; (D) 62.6 m; (E) 53.7 m.

(8) What is the direction of the velocity of the ball 2.00 s after kicko?

(+ for an angle above and ? for an angle below the horizontal)?

(A) ?13.8

; (B) 14.7

; (C) 19.6

; (D) ?18.5

; (E) 16.4

Please include equation used and how to do them pls!!!

5. (23sin42)^2 / 2*9.8 = 12.085 m

6. 2*23*sin42 / 9.8 = 3.14 sec
7. 23*cos42*3.14 = 53.67 m

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