Mechanics: Moments and Motion Along a Straight Line
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10 Terms
1
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what is a moment (of a force about a point)?
force x perpendicular distance from the line of action of the force to the point
2
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what is a couple?
a pair of equal and opposite coplanar forces(forces within the same plane)
3
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how to find the moment of a couple
force x perpendicular distance between the lines of action of forces
4
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the principle of moments
for an object in equilibrium, the sum of all the clockwise moments about any point \= the sum of all the anti-clockwise moments about that point
5
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instantaneous velocity
the velocity of an object at a specific point in time
can be calculated using a tangent-gradient from a displacement-time graph
can be calculated using a tangent-gradient from a displacement-time graph
6
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uniform acceleration
constant acceleration
7
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acceleration-time graphs
area under graph is change in velocity.
8
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velocity-time graphs
gradient=acceleration
area under graph is displacement
area under graph is displacement
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displacement-time graphs
gradient \= velocity
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suvat
s = displacement
u = initial velocity
v = final velocity
a = acceleration
t = time
u = initial velocity
v = final velocity
a = acceleration
t = time
Note 
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