Physics, 16.12.2021 21:00 maxy7347go
Given this graph plotting velocity versus time, estimate the acceleration of object A at points X and Y respectively.
A. 0 meters/second2 and -1 meter/second2
B. 0 meters/second2 and +1 meter/second2
C. 5 meters/second2 and -2 meters/second2
D. 9 meters/second2 and -1 meter/second2
E. 0 meters/second2 and +3 meters/second2
Answers: 1
Physics, 21.06.2019 23:30
Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work
Answers: 1
Physics, 22.06.2019 15:00
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
Given this graph plotting velocity versus time, estimate the acceleration of object A at points X an...
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