per second in still water, is headed east as it
Amotorboat, which has a speed of 5.0 meters
per second in still water, is headed east as it
crosses a river flowing south at 3.3 meters per
second. what is the magnitude of the boat’s
resultant velocity with respect to the starting
point?
(1) 3.3 m/s (3) 6.0 m/s
(2) 5.0 m/s (4) 8.3 m/s
Answers: 1
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Carbon-14 is a radioactive element that undergoes beta decay. which force is responsible for allowing carbon-14 to become stable? electromagnetic gravitational weak nuclear strong nuclear
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Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.
Answers: 3
Amotorboat, which has a speed of 5.0 meters
per second in still water, is headed east as it
per second in still water, is headed east as it
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