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31 Cards in this Set
- Front
- Back
- 3rd side (hint)
What is average speed and instantaneous speed? |
1. Rate of change of distance 2.rate at which distance is changing |
Dist |
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What is average and instantaneous velocity? |
1.rate of change of displacement. 2.rate at which displacement is changing. |
Not dist |
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What is average acceleration and instantaneous acceleration? |
1. Rate of change of velocity. 2.rate at which velocity is changing. |
Not dist or displacement |
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(Equations of motion) When x is missing ? |
V=u+at |
V is the subject |
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(Equations of motion) Without u? |
X=vt-1/2at^2 |
1/2 |
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(Equations of motion) Without v? |
X=ut+1/2at^2 |
1/2 |
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(Equations of motion) Without a? |
X=1/2(u+v)t |
t is last |
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(Equations of motion) Without t? |
V^2=u^2+2ax |
V^2 is the subject |
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Equation for linear momentum |
P=mass x velocity |
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Ni (Newton’s first law)? |
An object continues moving at a constant speed in a straight line, or remains at rest, unless acted upon by a resultant force. |
Objects stay as they are |
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Nii (Newton’s second law) |
The rate of change of an objects momentum is proportional to the resultant force acting on it. |
Proportion |
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Niii (Newton’s third law) |
If a exerts a force on b then be will exert an equal but opposite force on a. |
a<->b |
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Conservation of momentum |
The vector sum of momentum in a system stays constant provided there is no external resultant forces acting on that system. |
M1u1+m2u2=m1v1+m2v2 |
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Name the four types of collision |
Elastic collisions Inelastic collisions Perfectly inelastic collisions Explosive collisions |
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What is the symbol for momentum? |
P |
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Equations for force? |
F=ma Sum of F= p-weight |
Add more |
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What is conserved in elastic collisions |
Momentum and kinetic energy |
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What is conserved in elastic collisions |
Momentum and kinetic energy |
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What is conserved in inelastic collisions |
Momentum Ke is converted to other forms |
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What is conserved in elastic collisions |
Momentum and kinetic energy |
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What is conserved in inelastic collisions |
Momentum Ke is converted to other forms |
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How does momentum act in explosive collisions? |
There is no momentum before the collision and no momentum after the collision |
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Equation for kinetic energy? |
1/2mv^2 |
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Equation for gravitational potential energy? |
Pe=mgh |
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Equations for power? |
Power= work done over time Power = (force x distance) over time Power =force x velocity |
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Equation for work done? |
Wd = force x distance |
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To find spring constant? |
Mass x gravity= k x extension |
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Clues for when a strong nuclear force is involved In a reaction? |
Involves on hadrons/ quark make ups Reaction has a very short lifetime, less than a second. |
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Clues for when a reaction involves a weak nuclear force? |
Neutrinos involved? Change in quark flavour? Long lifetime (longer than a second) |
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Clues for when a reaction involves a weak nuclear force? |
Neutrinos involved? Change in quark flavour? Long lifetime (longer than a second) |
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Clues for a reaction with EM force? |
Do all particles have charge? Including any photons? (Gamma radiation) |
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