15. (10 points) An eagle is flying horizontally at 5 m/s with a fish in its claws. It accidentally drops the fish. a) How much time passes before the fish's speed triples? b) What is the angle between the fish's velocity vector and the horizontal at the instant its speed tripled? c) What is the magnitude of the displacement of the fish at that instant?

15. Three balls are thrown in the air. Ball A is thrown at an angle of 70°, ball B at 45° and ball C at 30°. The highest point reached by each ball is the same. Which of the following is true? ©Rutgers University 2021 Na. Ball A must go the farthest distance. Ball A must have the highest in initial speed. С. All must hit the ground at the same time. d All must hit the ground with the same speed. e. All balls must go the same distance.

A car is moving with velocity v as shown. The driver notices a deer ahead then he hits the brake to slow down the car. Which arrow best represents the acceleration vector of the car? O (H) (G) O (F) O (E) ○ (D) (B) ○ (C) O (A) ○ (1) V G. H. B. C. La=0 F D. E.

0 = 30° Vo = 25 m/s H = 200 m dx = ? A plane flying at 25 m/s is diving with an angle of 30° to the horizontal when it drops a package at an altitude of 200 m. a) What is the horizontal displacement of the package when it hits the ground? b) What angle does the package make when it hits the ground?

3. A rock is thrown with a speed of 30 m/s at an angle of 35° above the horizontal. A vertical wall is located 25 m away. How long will it take for the rock to hit the wall? How high up the wall does the rock strike the wall? What are the rock's velocity components when it strikes the wall? Does the rock strike the wall on its way up or its way down? 4 a) t = 1.02 s b) y = 12.4 m c) v = (24.6î +7.24ĵ) m/s d) On the way up!

4. A hockey player makes a shot 4m away from goal at a horizontal velocity of 15 m/s. How long does the goalie have to react to the shot?

1. Vo = 20.0 m/s S0.0° (0,0) 45.0 m (x, – 45.0 m) A ball is thrown upward from the top of a building at an angle of 30.0° to the horizontal and with an initial speed of 20.0 m/s, as in the figure. The point of release is 45.0 m above the ground. (a) How long does it take for the ball to hit the ground? (b) Find the ball's speed at impact. (c) Find the horizontal range of the ball. Neglect air resistance.

Question 3