MCAT Physics
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MCAT Physics
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25 Questions

1. R = ?xL / Ax ? = resistivity of wire material L = length of the wire Ax = cross - sectional area of the wire

2. The distance of pulling increases by the same factor that the _______.If the weight of the box is 100 N - you have to pull with a force of 100 N. For every 1 meter you pull - the box goes up 1 meter. When there is one moving pulley - the force needed

3. Beta=sqrt 1- v^2/c^2

4. Total momentum before = total momentum after.

5. xW = Fdcos? - F is force - d is the distance over which the force is applied - and ? is the angle between the force and distance. xDerived units - sign conventions - It is energy - and the unit is the Joule - Joule = N

6. ET = Ek + Ep and E = mc2

7. Kinetic energy is __________ - so there are no positive / negative signs to worry about.

8. Accelerate toward the ground at a constant velocity.

9. P =

10. The hypotenuse of a right - angled triangle with the radius as the other two sides. Using Pythagoras - the displacement is square root of 2r^2. The distance is the arc of 1/4 circumference.

11. mv - where m is mass - v is velocity and the symbol for momentum is p. xImpulse = Ft - where F is force and t is the time interval that the force acts.

12. ?x = Betax?xo

13. The speed.

14. Sliding down a frictionless inclined plane involves the __________ as doing a free fall at the same height.

15. Applies to objects sitting still. An object can sit still on an inclined plane because of static friction.

16. N = c / v c = speed of light = 3 E+8 m/s

17. Change in the apparent frequency of a wave as observer and source move toward or away from each other. Toward Away.

18. A hypothetical pendulum suspended by a weightless frictionless thread of constant length. f = 1/ T and T=2p(sqrt L/g)

19. Sum of all torques acting on an object is zero. No net angular acceleration.

20. A measure of both the speed and direction of a moving object. V=?x/?t

21. Horizontal: x-x?= v?xt + 0 Vertical: y-y? = v?xt +

22. M = mo / Beta

23. The resistance encountered when one body is moved in contact with another. FF =

24. Gravity is divided into two components on an inclined plane. One component is normal (perpendicular) to the plane surface: FN = mg

25. Instantaneous speed equals instantaneous velocity ____________.

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