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The figure shows a simple model of a seesaw. These consist of a plank/rod of mass mr and length 2x allowed to pivot freely about its center (or central axis), as shown in the diagram. A small sphere of mass m1 is attached to ...
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General Physics 2 years 1 Answer 3133 views

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Four children are playing in a field. The children form a line, holding hands. The player at the front of the line starts to spin around faster and faster, causing the others to run in circle, as shown in the ...
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General Physics 2 years 1 Answer 1676 views

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Learning Goal: To understand and apply the formula τ =Iɑ to rigid objects rotating about a fixed axis. To find the acceleration ɑ of a particle of mass m, we use Newton’s second law: , where 
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General Physics 2 years 1 Answer 3621 views

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A) A small car of mass m and a large car of mass 4m drive along a highway. They approach a curve of radius R. To not slip, both cars need to maintain a net force of F as they travel around the curve. ...
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General Physics 2 years 1 Answer 442 views

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A rock of mass 2 kg is lifted straight up by a 40 N vertical, applied force. What is the magnitude of the rock’s acceleration? All answers are in ms-2. For this question, use g = 10 ms-2.
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General Physics 2 years 1 Answer 274 views

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The position of a particle is given by x = bt – f t^3 where b and f are positive constants. x is in meters, t is in seconds. What are the units of b and f? There ...
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General Physics 2 years 1 Answer 242 views

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I have been thinking about gravity and magnetic force, and seeing that these two forces have a field, does their field ever finish. For example, the Earth’s gravity field weakens the further you go from the Earth, but ...
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General Physics 2 years 1 Answer 239 views

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I realize it might sound pretty stupid, but I’m curious as to what would happen if you were to take a lot of heat energy and simply compress it. Would there be combustion at some point or…? ...
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General Physics 2 years 1 Answer 235 views