Physics, 10.02.2021 19:10 HockeyBlockpk2857

# What concept should be used to determine the answer to the following: At what distance downstream will the boat reach the opposite shore?

a.

Resolving the boatâ€™s motion into two components: a motion directly across the river and a downstream motion.

c.

Both the boats directly horizontal displacement and velocity will add to the downstream displacement and velocity.

b.

The two parts of the motion must be considered as occurring simultaneously and for the same amount of time.

d.

All of the above.

Please select the best answer from the choices provided

A

B

C

D

Answers: 3

Physics, 21.06.2019 23:00

1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s

Answers: 2

Physics, 22.06.2019 08:30

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

Answers: 3

Physics, 22.06.2019 11:00

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

Answers: 3

Physics, 22.06.2019 15:00

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle Î¸ = 21Â° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the studentâ€™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 Î¸. (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

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