Fisica

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4. (I) If Vx = 6.80 units and Vy = 7.4 units, determinate the magnitude and the direction.

8. (II) Vector V1 is 6.6 units long and points along the negative x-axis. Vector V2 is 8.5units long and point at 45* angle to the positive x-axis.
A. What are the x and the y components of each vector?
B. Determine the sum V1 + V2 (magnitude and angle)

10. (II) threevectors are shown in fig. 3-32. Their magnitudes are given in arbitrary units. Determinate the sum of the three vectors. Give the resultant in terms of
a) Components
b)Magnitude and angle with the x-axis.

17. (I) A tiger leaps horizontal from a 6.5-m-high rock with a speed of 3.5m/s. how far from the base of the rock will she land?

21. (II) Romeo ischucking pebbles gently up to Juliet’s window, and he wants the pebbles to hit the window with only a horizontal component of a velocity. He is standing at the edge of a rose garden 4.5m below herwindow and 5.0m from the base of the wall. How fast are the pebbles going when they hit her window?

21. (II) a ball is thrown horizontally from the roof of a building 45.0m tall and lands 24.0mfrom the base. What was the ball’s initial speed?

23. (II) a ball thrown horizontally at 22.2m/s from the roof of building lands 36.0m from the base of the building. How tall is the building?30. (II) a projectile is fired with an initial speed of 65.2m/s of an angle of 34.5* above the horizontal on a long flat firing range. Determinate (a) the maximum height reached by theprojectile, (B) the total time in the air (C) the total horizontal distance covered (that is, the range) and (D) the velocity of the projectile 1.50s after firing.

31. (II) a shotputter throws the shotwith an initial speed of 15.5m/s at a 34.0* angle to the horizontal. Calculate the horizontal distance traveled by the shots if it leaves the athlete’s hand at a height of 2.20m above the ground.

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