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Physics test 2
| Term | Definition |
|---|---|
| force | a push or pull on an object |
| mass | a measure of how much inertia an object has |
| Newton's 1st Law | every object continues in its state of rest, or of uniform velocity in a straight line, as long as no net force acts on it |
| Newton's 2nd Law | F = ma |
| Newton's 3rd Law | If object A exerts a force on object B, then object B exerts a force of the same magnitude on object A but in the opposite direction |
| weight | the force on an object due to gravity |
| kinetic frictional force | F(fr) = u(k)*F(N) |
| maximum static frictional force | F(fr) is less than or equal to u(s)*F(N) |
| centripetal acceleration | a(rad) = (v^2)/r |
| direction of centripetal acceleration | towards the center of the circle |
| period (T) | the time it takes to complete one revolution |
| speed in terms of the period | v = (2*pi*r)/T |
| a(rad) in terms of the period | a = (4*pi*r^2)/T^2 |
| centripetal acceleration net force | F = (m*v^2)/r |
| universal constant G | 6.67*10^-11 |
| force of gravity | G (m1*m2)/r^2 |
| period of an orbit | T^2 = ((4*pi^2)/(G*m(E))) * r^3 |
| work | F*d*cos(theta) |
| joule (J) | the SI unit for work |
| kinetic energy | 1/2*m*v^2 |
| work energy theorem | W(net) = delta KE |
| potential energy in terms of work | W = -delta PE |
| work done by gravity on a falling object | -m*g*(y2-y1) |
| potential energy | mgy |
| Hooke's Law | F(ext) = k*x |
| elastic potential energy | 1/2*k*x^2 |
| conservative force | work done is independent of the path followed |
| non-conservative force | work done depends on the path taken |
| zero-work forces | never do any work |
| power | W/delta t |
| watt (W) | the SI unit for power |
| power for a constant force | p = F*v*cos(theta) |
| momentum | p = m*v |
| Kg*m/s | the SI unit for momentum |
| isolated system | the total force on the system is zero, momentum is conserved |
| impulse | F* delta t |
| N*s | the SI unit for impulse |
| impulse-momentum theorem | F = delta p/delta t |
| elastic collision | a collision where both the total kinetic energy and momentum are conserved |
| inelastic collision | a collision where momentum is conserved but total kinetic energy is not |
Created by:
imr36093
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