Chapter 3: Q1. (page 67)
You are adding vectors of length 20 and 40 units. Which of the following choices is a possible resultant magnitude?(a) 0.(b) 18.(c) 37.(d) 64.(e) 100.
The possible resultant magnitude is option (c) 37.
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A ball is thrown horizontally from the roof of a building 7.5 m tall and lands 9.5 m from the base. What was the ball’s initial speed?
Figure 3-33 shows two vectors,and, Whose magnitudes are A = 6.8 units and B = 5.5 units. Determineif (a)(b)(c). Give the magnitude and direction for each.
Figure 3-33 Problem 7
A baseball is hit with a speed ofat an angle of. It lands on the flat roof of a 13.0 m tall nearby building. If the ball was hit when it was 1.0 m above the ground, what horizontal distance does it travel before it lands on the building?
A hunter is aiming horizontally at a monkey who is sitting in a tree. The monkey is so terrified when it sees the gun that it falls off the tree. At that very instant, the hunter pulls the trigger. What will happen?
(a) The bullet will miss the monkey because the monkey falls down while the bullet speeds straight forward.
(b) The bullet will hit the monkey because both the monkey and the bullet are falling downward at the same rate due to gravity.
(c) The bullet will miss the monkey because, although both the monkey and the bullet are falling down due to gravity, the monkey is falling faster.
(d) It depends on how far the hunter is from the monkey.
A light plane is headed due south with a speed of 185 km/h relative to still air. After 1.00 h, the pilot notices that they have covered only 135 km, and their direction is not south buteast of south. What is the wind velocity?
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