(Solved): Two vectors, A and B. are situated as shown in the x-y plane. Which of the following best represent ...

Two vectors, A and B. are situated as shown in the x-y plane. Which of the following best represents the components of A and B? (A) Ax4 cos 30°, B, B sin 30°. Ay-A cos 30º. By --B cos 30º (B) Ax-A sin 30º. B =-B sin 30°, Ay=-A cos 30°, By -B sin 30° (C) Ax=-A cos 30º. Bx B cos 30°, Ay B cos 30° (D) Ax4 sin 30º. B --B sin 30°. Ay B cos 30° (E) Ax=-A cos 30°, Bx B sin 30°. Ay A sin 30º. By A sin 30°, By A sin 30°. By 1 B B cos 30°. You are given the following two vectors; S = 120. Newtons at 30° west of north H = 200. Newtons at 70" cast of south Which of the following best represents the resultant R of vectors of S and H ? (A) R133. Newtons 74" north of cast (C) R - 133. Newtons 16" cast of north (E) R = 320. Newtons 74" north of cast (B) R-133. Newtons 74° cast of north (D) R-320. Newtons 74" cast of north A 0.5 kg rock is kicked horizontally with a speed of 8.0 m/s off the edge of a cliff that is 80.0 m tall. Neglecting air resistance, which of the following is correct? (A) The rock is airborne for 2.0 seconds, its final horizontal speed is 8.0. m/s and its final vertical speed is 40. m/s. (B) The rock is airborne for 4.0 seconds, its final horizontal speed is 40. m/s and its final vertical speed is 8.0 m/s. (C) The rock is airborne for 16. seconds, its final horizontal speed is 0.0 m/s and its final vertical speed is 8.0 m/s. (D) The rock is airborne for 16. seconds, its final horizontal speed is 8.0 m/s and its final vertical speed is 0.0 m/s. (E) The rock is airborne for 4.0 seconds, its final horizontal speed is 8.0 m/s and its final vertical speed is 40. m/s. A projectile is shot horizontally off a tall cliff of height // into a deep valley below the cliff. Which of the following equations correctly depicts the amount of time it takes the object to impact the valley below the cliff? H (A) t = 2g $ (B) t = 2 (C) t = (D) t = (E) t = 9 9 H 9 30" 301