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A freight train is moving at a constant speed of A freight train is moving at a constant speed of 10 m/s. A ma n standing on a flatcar throws a ball into the air and catches it as it falls. Relative to the flatcar, the initial velocity of the ball is 15 m/s straight […]

A fisherman sets out upstream from Metaline Falls on the Pend Oreille River in northwestern A fisherman sets out upstream from Metaline Falls on the Pend Oreille River in northwestern Washington State. His small boat, powered by an outboard motor, travels at a constant speed ν in still water. The water flows at a lower […]

An object falls a distance h from rest. If it An object falls a distance h from rest. If it travels 0.50h in the last 1.00 s, find (a) The time and (b) The height of its fall. (c) Explain the physically unacceptable solution of the quadratic equation in t that you obtain. Is this […]

An object has constant acceleration a = 4 m/s2. At An object has constant acceleration a = 4 m/s2. At t = 0, its velocity is 1 m/s and it is at x = 7 m. How fast is it moving when it is at x = 8 m? What is t at that point? […]

An iceboat has a constant velocity toward the east when An iceboat has a constant velocity toward the east when a sudden gust of wind causes the iceboat to have a constant acceleration toward the east for a period of 3.0 s. A plot of x versus / is shown in Figure, where t = […]

Building Height Spider-Man steps Building Height Spider-Man steps from the top of a tall bni1ding. He falls freely from rest to the ground a distance of h. He falls a distance of hl4 in the last 1.0 s of his fall. What is the height h of the bni1ding? Is this the question you were […]

A football kicker can give the ball an initial speed A football kicker can give the ball an initial speed of 25m/s. What are the (a) Least and (b) Greatest elevation angles at which he can kick the ball to score a field goal from a point 50 m in front of goalposts whose horizontal […]

A football player punts the football so that it will A football player punts the football so that it will have a “hang time” (time of flight) of 4.5 s and land 46 m away. If the ball leaves the player’s foot 150 cm above the ground, what must be the (a) Magnitude and (b) […]

A world’s land speed record was set by Colonel John A world’s land speed record was set by Colonel John P. Stapp when in March 1954 he rode a rocket-propelled sled that moved along a track at 1020 km/h. He and the sled were brought to a stop in 1.4 s. (See Fig. 2-7.) In […]

A football is kicked at ground level with a speed A football is kicked at ground level with a speed of 18.0m/s at an angle of 35.0o to the horizontal. How much later does it hit the ground? Is this the question you were looking for? If so, place your order here to get started!