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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 7 years 1 Answer 888 views

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General Physics 7 years 1 Answer 2372 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 7 years 1 Answer 8591 views

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PRemastered
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 7 years 1 Answer 1735 views

  1. Velocity of a Roller Coaster Ranking Task

    PRemastered
    PRemastered
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    September 26, 2017 at 5:13 am
    The ranking is in the order of decreasing speed a,          

  3. Understanding Newton’s Law of Universal Gravitation

    PRemastered
    PRemastered
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    September 26, 2017 at 5:13 am
    A) What is the size of the gravitational force acting on the

  4. Two Cars on a Curving Road

    PRemastered
    PRemastered
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    September 26, 2017 at 5:13 am
    A) A small car of mass m and a large car of mass 4m drive al

  5. Normal Force and Centripetal Force Ranking Task

    PRemastered
    PRemastered
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    September 26, 2017 at 5:11 am
    => Fc = mv2/r

  6. Math Box: Inverse-Square Relationships

    PRemastered
    PRemastered
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    September 26, 2017 at 5:11 am
    A) Consider the case in which the constant A equals 16. Plot

  7. Accelerating along a Racetrack

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    September 26, 2017 at 5:10 am
    A) Let  be the velocity of the car at point A. What can you

  8. Two ladybugs sit on a rotating disk, as shown in the figure (the ladybugs are at rest with respect to the surface of the disk and do not slip). Ladybug 1 is halfway between ladybug 2 and the axis of rotation.

    PRemastered
    PRemastered
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    September 26, 2017 at 4:48 am
    A) What is the angular speed of ladybug 1? => the same as

  9. Our Sun rotates about the center of our Galaxy (mG≈4×1041kg) at a distance of about 3×104 light-years

    PRemastered
    PRemastered
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    September 25, 2017 at 5:33 pm
    For the orbital period (in seconds), the expression is - T =

  10. Linear and Rotational Quantities Conceptual Question

    PRemastered
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    September 24, 2017 at 5:20 pm
    A) Which child moves with greater magnitude of velocity? =>

  11. Net Torque on a Pulley

    PRemastered
    PRemastered
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    September 24, 2017 at 5:19 pm
    The cord moves on the pulley without slipping or stretching.

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The question goes like this: A ball is thrown straight up. At 12m, the ball reaches a velocity of 15m/s. What is the time it takes for the ball to go from the top of its path, ...
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General Physics 7 years 1 Answer 1015 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 7 years 1 Answer 993 views

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Can anyone tell me the most BASIC, and watered down rundown of string theory? Pretend you’re telling a random off the street that doesn’t know anything past 11th grade physics.
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General Physics 7 years 1 Answer 992 views

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Two sections of a train track are 1 mile each. They are attached to each other forming a straight line. Each track expands 1.00 ft in length under the hot sun causing the track to buckle. If each ...
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General Physics 7 years 1 Answer 991 views