*81. ssm A woman and her dog are out for a morning run to the river, which is located 4.0 km away. The woman runs at 2.5 m/s in a straight line. The dog is unleashed and runs back and forth at 4.5 m/s between his owner and the river, until the woman reaches the river. What is the total distance run by the dog?
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- As an apple tree is transported by a truck moving to the right with a constant velocity, one of its apples shakes loose and falls toward the bed of the truck. Of the curves shown in Figure CQ3.13, (i) which best describes the path followed by the apple as seen by a stationary observer on the ground, who observes the truck moving from his left to his right? (ii) Which best describes the path as seen by an observer sitting in the truck? Figure CQ3.13Chapter 03, Problem 49 From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces the window. Using the data in the drawing, determine the distances (a) D and (b) H, which locate the point where the gun was fired. Assume that the bullet does not slow down as it passes through the window.A bomber is flying horizontally over level terrain at a speed of 265 m/s relative to the ground and at an altitude of 2.90 km. (a) The bombardier releases one bomb. How far does the bomb travel horizontally between its release and its impact on the ground? Ignore the effects of air resistance.? km(b) Firing from the people on the ground suddenly incapacitates the bombardier before he can call, "Bombs away!" Consequently, the pilot maintains the plane's original course, altitude, and speed through a storm of flak. Where is the plane relative to the bomb's point of impact when the bomb hits the ground? ?ahead of the bomb ?directly above the bomb ?behind the bomb (c) The plane has a telescopic bombsight set so that the bomb hits the target seen in the sight at the moment of release. At what angle from the vertical was the bombsight set?? ° forward from the vertical
- A game requires that two children each throw a ball upward as high as possible from point O and then run horizontally in opposite directions away from O. The child who travels the greater distance before their thrown ball impacts the ground wins. If child A throws a ball upward with a speed of v1 = 59 ft/sec and immediately runs leftward at a constant speed of vA = 14 ft/sec while child B throws the ball upward with a speed of v2 = 56 ft/sec and immediately runs rightward with a constant speed of vB = 16 ft/sec, which child will win the game? Calculate the distances sA and sB that each child travels while the respective ball is in the air.Chinook salmon are able to move through water especially fast by jumping out of the water periodically. This behaviour is called propoising. Suppose a salmon swimming in still water jumps out of the water with velocity 6.26 m/s at 45.0˚ above the horizontal, sails through the air a distance L before returning to the water and then swims the same distance L underwater in a straight horizontal line with velocity 3.58m/s before jumping out again (a) determine the average velocity of the fish for the entire process of jumping and swimming underwater (b) time interval reduced by the jumping/swimming process compared with simply swimming underwater at 3.58 M/s?A cliff of height 910 m in a park .Assume a jumper runs off the cliff with a speed of 5 m/sec at an angle of 100 and enjoys a free fall until he is 150 m above the valley floor, at which time she opens her parachute. How long is the jumper in free fall? (Ignore air resistance) It is important to be as far away from the cliff as possible before opening the chute. How far away from the cliff is the jumper when she opens her chute?
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- Two cars, A and B, travel in the same direction on a straight section of highway. A has a speed of 69.0 km/h, and B a speed of 75.0 km/h (both relative to the earth). What is the speed of B relative to A? If A is initially 355 m in front of B, how long will it take for B to reach A?A marble is launched from the edge of a table at a angle of 45 ° up from horizontal and goes through the air until it hits the floor. True or False? For such a marble, |vx| (the magnitude of the x-component of the velocity) is decreasing the entire time the marble is airborne.A rugby player runs with the ball directly toward his opponent’s goal, along the positive direction of an x axis. He can legally pass the ball to a teammate as long as the ball’s velocity relative to the field does not have a positive x component. Suppose the player runs at speed 4.0 m/s relative to the field while he passes the ball with velocity relative to himself. If has magnitude 6.0 m/s, what is the smallest angle it can have for the pass to be legal?