- 1.2 m/s, y = 2.4 The position of a bird in the xy-plane is given by Btî + (yt-c t?)j where a = and B = -4.8 m/s. What is the bird's net acceleration at 2.0 s (magnitude and direction)? %3D O 2.4 m/s2 in the -y direction O 7.2 m/s? in the +y direction O 1.2 m/s2 in the +y direction O 7.2 m/s? in the -y direction O 5.4 m/s2 in the +y direction 5.4 m/s2 in the -y direction O 2.4 m/s? in the +y direction O 1.2 m/s2 in the -y direction

At the instant shown, the car at A is traveling at 21 m.s¹ around the curve of radius 67 m while its speed is increasing at 4 m.s2. The car at B travels at 2 m.s¹ along the straightaway. UB BOJ pm pm 45° AG VA The relative velocity of A with respect to B is aA/B-25.0 m.s-² Determine the acceleration of the car at B. (put your answer in the cell below)

An arrow is launched from ground level, with an initial speed of 27.2 m/s at an angle of 31.4° above the horizontal. Neglect air resistance, and take upward as the positive direction. a) How much time is needed for the arrow to reach its maximum height, b) what is this maximum heightc) how long does it take to land on the ground againd) how far does it travel right before it lands.

A person who is 1.2 m tall throws a ball with a speed of 21 m/s at an angle of 33 degrees above the horizontal, as show h = 1.2 m, v = 21 m/s, 0 = 33 degrees Use the acceleration due to gravity as g = 10 m/s². XE X What are the x and y components of the initial velocity? 0 m/s Submit Answer Tries 0/2 What are the x and y components of the ball's velocity when it is at its maximum height? ) m/s Submit Answer Tries 0/2 What are the x and y components of the ball's velocity the instant before it hits the ground? ) m/s Submit Answer Tries 0/2 What is the ball's speed (the magnitude of the velocity) the instant before it hits the ground? m/s Submit Answer Tries 0/2 What is the time of flight; that is, the time taken for the ball to hit the ground after it has left the person's hand? Submit Answer Tries 0/2 y

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Completion Status: A Moving to the next question prevents changes to this answer. Quèstion 1 1.25 p A projectile is fired with an initial speed Vo = 20 m/s at an angle of 37° above the horizontal, as shown in the figure. What is its velocity (in m/s) at the highest point? 37 R O a. v = 16i O b. v = 0 Oc.v 12j O d. v = 12i - 16j O e. v = 16i +12j

11. A moderate wind accelerates a pebble over a horizontal ry plane with a constant acceleration â = (5.00 m/s?)î + (5.00 m/s²)j. At time t (4.00m/s)i. What are the (a) magnitude and (b) anggle of its velocity when it has been displaced by 12.0 m parallel to the x axis? 0, the velocity is %3D |3|

A particle moves on horizontal circular path of radius 15m such that its speed is given V = 5t? +15 by where t in second and V in m/s. What is the total ?acceleration of the particle at t 3 s (in m/s?)

PAGE 82. Savannah Dread HOMEWORK CHAPTER 3 t= d= 9 Water pistol horizontally aimed. The speed stream is v, = 5.00 m/s. a) How far has stream dropped at 1.00 m out? b) At what distance out will it have dropped 1.0 cm (= .010 m)? Ans. a. -1.96 x 10¹ m (- 19.6 cm), b. 2.26 x 10¹ m (22.6 cm) d

2. A particle moves in uniform circular motion, over a horizontal xy- plane. At one instant it moves through the points (2.0 m, 4.0 m) with a velocity of -6.00i m/s and an acceleration of 18.0j m/s?. a) Draw the circular path of the particle and label the velocity vector and the acceleration vector. b) Calculate the x and y-coordinates of the center of the circular path. c) Calculate the period of rotation.