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The figure below shows two blocks suspended by a cord over a pulley. The mass of block B is twice the mass of block A, while the mass of the pulley is equal to the mass of block A. The ...
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General Physics 2 years 1 Answer 2674 views

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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 3862 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 1991 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 4463 views

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Six roller-coaster carts pass over the same semicircular “bump.” The mass M of each cart (including passenger) and the normal force n of the track on the cart at the top of each bump are given in the figures. Rank the speeds of ...
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General Physics 2 years 1 Answer 662 views

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My current picture of how gravity works is this (its probably wrong because it doesnt work for light. I’d like a better explanation from you guys): objects have to move in the speed of light in space ...
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General Physics 2 years 1 Answer 312 views

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Keira starts at position x = 23 m along a coordinate axis. She then undergoes a displacement of -45 m. What is her final position?
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General Physics 1 year 0 Answers 1245 views

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I have two thoughts on this. One, the speed of dark is the same as light. two, the speed of dark is infinite and we can’t observe it because it only replaces light as fast as the light ...
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General Physics 2 years 1 Answer 279 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 277 views