The apparatus for a popular lecture demonstration is shown in Fig. 3.35. A gun is aimed directly at a can, which is released at the same time that the gun is fired.
This gun won’t miss as long as the initial speed of the bullet is sufficient to reach the falling target before the target hits the floor. Verify this statement, using the figure.
Answer to relevant QuestionsA shot-putter launches the shot from a vertical distance of 2.0 m off the ground (from just above her ear) at a speed of 12.0 m/s. The initial velocity is at an angle of above the horizontal. Assume the ground is flat. (a) ...While you are traveling in a car on a straight, level interstate highway at 90 km/h, another car passes you in the same direction; its speedometer reads 120 km/h. (a) What is your velocity relative to the other driver? (b) ...A moving walkway in an airport is 75 m long and moves at a speed of 0.60 m/s. A passenger, after traveling 25 m while standing on the walkway, starts to walk at a speed of 0.50 m/s relative to the surface of the walk-way. ...An observer by the side of a straight, level, north-south road watches a car (A) Moving south at a rate of 75 km/h. A driver in another car (B) Going north at 50 km/h also observes car A. (a) What is car A’s velocity as ...A ball rolling on a table has a velocity with rectangular components vx = 0.60 m/s and vy = 0.80 m/s. What is the displacement of the ball in an interval of 2.5 s?
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