Lab question and 30 2D Kinematics questions

Questions

1. Question 1

   1 PointA person on the west bank of a river wants to take a motor boat straight across a river to the east bank in the shortest distance possible (a straight line due east across the river). The boat's motor can propel the boat at 40 m/s (relative to the water), and the river flows south at 10 m/s. At what angle must the person aim the boat relative to clockwise rotation from due East (i.e. your standard x-y coordinate system) in order to travel due East and straight across the river?

2. Question 2

   1 PointAt the instant a bullet (Bullet A) is being fired horizontally from a gun, an identical bullet (Bullet B) is dropped from the same height as the muzzle of the firing gun.Briefly describe the order in which bullets A and B hit the ground. Bullet A hits the ground first.Bullet B hits the ground first.The bullets hit the ground at the same time.

3. Question 3

   1 PointA softball coach throws a 0.18 kg ball horizontally to her player with an initial velocity of 40 m/s. The ball leaves her hand at 2 m high, and her catcher is 20 meters away.What is the initial horizontal velocity, vxi, in m/s?Integer, decimal, or E notation allowed

4. Question 4

   1 PointA softball coach throws a 0.18 kg ball horizontally to her player with an initial velocity of 40 m/s. The ball leaves her hand at 2 m high, and her catcher is 20 meters away.What is the initial vertical velocity, vyi, in m/s? (+ is for up, - is for down)Integer, decimal, or E notation allowed

5. Question 5

   1 PointA softball coach throws a 0.18 kg ball horizontally to her player with an initial velocity of 40 m/s. The ball leaves her hand at 2 m high, and her catcher is 20 meters away.What is the horizontal acceleration, ax, in m/s2?Integer, decimal, or E notation allowed

6. Question 6

   1 PointA softball coach throws a 0.18 kg ball horizontally to her player with an initial velocity of 40 m/s. The ball leaves her hand at 2 m high, and her catcher is 20 meters away. What is the vertical acceleration, ay, in m/s2? (+ is for up, - is for down)Integer, decimal, or E notation allowed

7. Question 7

   1 PointA softball coach throws a 1 kg ball horizontally to her player with an initial velocity of 40 m/s. The ball leaves her hand at 2 m high, and her catcher is 20 meters away.What is the final horizontal velocity, vxf, in m/s?Integer, decimal, or E notation allowed

8. Question 8

   1 PointA softball coach throws a 1 kg ball horizontally to her player with an initial velocity of 40 m/s. The ball leaves her hand at 2 m high, and her catcher is 20 meters away. How long is the ball in the air?Integer, decimal, or E notation allowed

9. Question 9

   1 PointA softball coach throws a 0.18 kg ball horizontally to her player with an initial velocity of 40 m/s. The ball leaves her hand at 2 m high, and her catcher is 20 meters away. How many meters above the ground is the ball when it arrives at the catcher?Integer, decimal, or E notation allowed

10. Question 10

    1 PointAn M-16 is fired from level ground at an upwards angle of 10 degrees with respect to the horizontal. The initial velocity of the bullet is 948 m/s. Ignore air resistance and the curvature of the earth in this problem. What is the initial horizontal velocity, vxi, in m/s?Integer, decimal, or E notation allowed

11. Question 11

    1 PointAn M-16 is fired from level ground at an upwards angle of 10 degrees with respect to the horizontal. The initial velocity of the bullet is 948 m/s. Ignore air resistance and the curvature of the earth in this problem. What is the initial vertical velocity, vyi, in m/s? (+ is for up, - is for down)Integer, decimal, or E notation allowed

12. Question 12

    1 PointAn M-16 is fired from level ground at an upwards angle of 10 degrees with respect to the horizontal. The initial velocity of the bullet is 948 m/s. Ignore air resistance and the curvature of the earth in this problem. What is the horizontal acceleration, ax, in m/s2?Integer, decimal, or E notation allowed

13. Question 13

    1 PointAn M-16 is fired from level ground at an upwards angle of 10 degrees with respect to the horizontal. The initial velocity of the bullet is 948 m/s. Ignore air resistance and the curvature of the earth in this problem.What is the vertical acceleration, ay, in m/s2? (+ is for up, - is for down)Integer, decimal, or E notation allowed

14. Question 14

    1 PointAn M-16 is fired from level ground at an upwards angle of 10 degrees with respect to the horizontal. The initial velocity of the bullet is 948 m/s. Ignore air resistance and the curvature of the earth in this problem. What is the final horizontal velocity, vxf, in m/s?Integer, decimal, or E notation allowed

15. Question 15

    1 PointAn M-16 is fired from level ground at an upwards angle of 10 degrees with respect to the horizontal. The initial velocity of the bullet is 948 m/s. Ignore air resistance and the curvature of the earth in this problem. What is the final vertical velocity, vyf, in m/s?Integer, decimal, or E notation allowed

16. Question 16

    1 PointAn M-16 is fired from level ground at an angle of 10 degrees with the horizontal. The initial velocity of the bullet is 948 m/s. Ignore air resistance and the curvature of the earth in this problem. At the peak of its flight, what is the velocity of the bullet in the x-direction?Integer, decimal, or E notation allowed

17. Question 17

    1 PointAn M-16 is fired from level ground at an angle of 10 degrees with the horizontal. The initial velocity of the bullet coming out of the gun is 948 m/s. Ignore air resistance and the curvature of the earth in this problem. At the peak of its flight, what is the velocity of the bullet in the y-direction?Integer, decimal, or E notation allowed

18. Question 18

    1 PointAn M-16 is fired from level ground at an angle of 10 degrees with the horizontal. The initial velocity of the bullet is 948 m/s. Ignore air resistance and the curvature of the earth in this problem. What is the height difference, Δy, between the point where the bullet is fired and the point where the bullet lands?Integer, decimal, or E notation allowed

19. Question 19

    1 PointAn M-16 is fired from level ground at an angle of 10 degrees with the horizontal. The initial velocity of the bullet is 948 m/s. Ignore air resistance and the curvature of the earth in this problem. How long is the bullet in the air?Integer, decimal, or E notation allowed

20. Question 20

    1 PointAn M-16 is fired from level ground at an angle of 10 degrees with the horizontal. The initial velocity of the bullet is 948 m/s. Ignore air resistance and the curvature of the earth in this problem. How far does the bullet travel horizontally?Integer, decimal, or E notation allowed

21. Question 21

    1 PointAn M-16 is fired from level ground at an angle of 10 degrees with the horizontal. The initial velocity of the bullet is 948 m/s.If air resistance were considered, how would this affect the horizontal distance the bullet traveled?Air resistance would increase the distance the bullet travels.Air resistance would decrease the distance the bullet travels.Air resistance would not affect the distance the bullet travels.

22. Question 22

    1 PointAn M-16 is fired from level ground at an angle of 10 degrees with the horizontal. The initial velocity of the bullet is 948 m/s. Ignore air resistance and the curvature of the earth in this problem. At what other angle could the gun be fired and travel the same horizontal distance?Integer, decimal, or E notation allowed

23. Question 23

    1 PointA typical human contains 5.00 L of blood, and it takes 1.00 min for all of it to pass through the heart when the person is resting with a pulse rate of 75.0 heartbeats/ minute. On the average, what volume of blood, in liters, does the heart pump during each beat? (number only, no units)Integer, decimal, or E notation allowed

24. Question 24

    1 PointA coyote chasing a rabbit is moving 8.00 m/s due east at one moment and 8.80 m/s due south 3.80 s later. Let the x axis point due east and the y axis point due north. What is the magnitude of the coyote’s average acceleration during that time? (number only, no units)Integer, decimal, or E notation allowed

25. Question 25

    1 PointA coyote chasing a rabbit is moving 8.00 m/s due east at one moment and 8.80 m/s due south 3.80 s later. Let the x axis point due east and the y axis point due north. What is the direction of the coyote’s average acceleration during that time? (expressed as a positive angle that is counterclockwise from the +x-axis)Integer, decimal, or E notation allowed

26. Question 26

    1 PointCanadian geese migrate essentially along a north-south direction for well over a thousand kilometers in some cases, traveling at speeds up to about 100 km/h. If one such bird is flying at 100 km/h relative to the air, but there is a 40.0 km/h wind blowing from west to east, in what direction should this bird head so that it will be traveling directly southward relative to the ground? (express as a positive angle counterclockwise from due east)Integer, decimal, or E notation allowed

27. Question 27

    1 PointCanadian geese migrate essentially along a north-south direction for well over a thousand kilometers in some cases, traveling at speeds up to about 100 km/h. If one such bird is flying at 100 km/h relative to the air, but there is a 40.0 km/h wind blowing from west to east, how long will it take the bird to cover a ground distance of 500 km from north to south? (express answer in number of hours, number only, no units)Integer, decimal, or E notation allowed

28. Question 28

    1 PointA grasshopper leaps into the air from the edge of a vertical cliff. It's initial velocity is at an angle of 50 above the horizontal, It reaches a maximal height of 6.74 cm above the launch point, and lands at the bottom of the cliff at horizontal distance of 1.06 m from the cliff, see figure. What was the initial speed of the grasshopper's jump? [Image unavailable: pasted image 0.png] Integer, decimal, or E notation allowed

29. Question 29

    1 PointA grasshopper leaps into the air from the edge of a vertical cliff. It's initial velocity is at an angle of 50 above the horizontal, It reaches a maximal height of 6.74 cm above the launch point, and lands at the bottom of the cliff at horizontal distance of 1.06 m from the cliff, see figure. What is the height of the cliff? [Image unavailable: pasted image 0(1).png] Integer, decimal, or E notation allowed

30. Question 30

    1 PointIn fighting forest fires, airplanes work in support of ground crews by dropping water on the fires. For practice, a pilot drops a canister of red dye, hoping to hit a target on the ground below. If the plane is flying in a horizontal path 90.0 m above the ground and has a speed of 64.0 m/s (143 mi/h), at what horizontal distance (in meters) from the target should the pilot release the canister? Ignore air resistance.Integer, decimal, or E notation allowed

31. Question 31

    1 PointOn the first play of a football game, the kicker kicks the ball with a speed of 25 m/s, and the ball travels a distance of 60 m. There are two angles at which the ball could have been kicked. What is the larger of the two angles? Ignore air resistance. Answer in degrees.Integer, decimal, or E notation allowed

32. Question 32

    1 PointOn the first play of a football game, the kicker kicks the ball with a speed of 25 m/s, and the ball travels a distance of 60 m. Given the two angles at which the ball could have been kicked, there are two times during which the ball could have been in the air. What is the larger of the two times? Ignore air resistance. Answer in seconds.
    
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