That point at which the mass of the object may be thought to be concentrated.
1 of 17
If freely suspended, an object will come to rest where?
With it's centre of mass directly below the point of suspension.
2 of 17
The centre of mass of a symmetrical object is where?
Along the axis of symmetry.
3 of 17
For a simple pendulum the equation is...
T = 1/F (where T is periodic time in seconds and F is frequency in hertz)
4 of 17
What does the time period of one complete oscillation of a pendulum depend on?
The length of the pendulum.
5 of 17
What is the moment?
The turning effect of a force.
6 of 17
The size of the moment is given by which equation?
M = F x D (where M is the moment of the force in newton-metres, F is the force in newtons and D is the perpendicular distance from the line of action of the force to the pivot in metres).
7 of 17
If an object is not moving then what is the relationship between the total clockwise and total anticlockwise moment about any pivot?
They must be equal.
8 of 17
What will happen if the line of action of the weight of an object lies outside the base of the object?
There will be a resultant force and the object will tend to topple over.
9 of 17
Are liquids able to be compressed or not?
No. They are incompressible.
10 of 17
How is the pressure in a liquid transmitted?
It is transmitted equally in all directions.
11 of 17
What is the benefit of hydraulics?
It can be used as a force multiplier, with the use of different cross-sectional areas.
12 of 17
How is the pressure in different parts of a hydraulic system given?
Using P = F / A (where P = pressure in pascals, F = force in newtons and A = the cross-sectional area in metres squared.
13 of 17
What happens to an object's acceleration when it moves in a circle?
It continuously accelerates towards the centre of the circle.
14 of 17
What does this acceleration change?
The direction of motion of the body, not it's speed.
15 of 17
What is the centripetal force? And where is it directed?
The resultant force causing the acceleration and towards the centre of the circle.
16 of 17
What 3 things causes the centripetal force to increase?
If the mass of the object increases, if the speed of the object increases and if the radius of the circle increases.
17 of 17
Other cards in this set
Card 2
Front
If freely suspended, an object will come to rest where?
Back
With it's centre of mass directly below the point of suspension.
Card 3
Front
The centre of mass of a symmetrical object is where?
Back
Card 4
Front
For a simple pendulum the equation is...
Back
Card 5
Front
What does the time period of one complete oscillation of a pendulum depend on?
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