Physics, 11.01.2021 17:40 milkshakegrande101
A rock is attached to the end of a 3.2 m long string and whirled in a circle at 25
m/s. If a force of 37.5 N caused the motion, what is the mass of the rock? *
2.7kg
3.3kg
4.8kg
7.9kg
Answers: 2
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Juan created a chart to him study for a test. which headings best complete the chart? x: transparent objects y: opaque objects x: opaque objects y: transparent objects x: high frequency waves y: low frequency waves x: low frequency waves y: high frequency waves
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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".
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Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?
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A rock is attached to the end of a 3.2 m long string and whirled in a circle at 25
m/s. If a force...
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