Physics, 12.03.2020 22:25 suhailalitariq
In lacrosse, a ball is thrown from a net on the end of a stick by rotating the stick and forearm about the elbow. If the angular velocity of the ball about the elbow joint is 26.3 rad/s and the ball is 1.25 m from the elbow joint, what is the velocity v of the ball?
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=force × distance a. work b. velocity c. pressure d. momentum
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Which of the following are guidelines to follow for obtaining accurate observations
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Physics, 22.06.2019 16:40
Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".
Answers: 3
In lacrosse, a ball is thrown from a net on the end of a stick by rotating the stick and forearm abo...
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