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Momentum (car safety features (Seat belt, Air bag, Front crumple zone,…
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newton
newton's second law
acceleration of an object is proportional to the resultant force and is inversely proportional to the mass of the object
object move at the same speed and direction until a resultant force acts on it (this property is called inertia)
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newton's first law
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if resultant force is zero then: 1. stationary object stays stationery
- a moving object stays at the same velocity (same speed and direction aswell)
method
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Set up the equipment as shown in the diagram. Make sure that the air track is level, and that the card will pass through both gates before the masses strike the floor.
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Use scales to measure the total mass of the glider, string and weight stack. Record this value.
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Remove one weight and attach it to the glider using blu-tack. This will keep the total mass constant. (The weight stack is being accelerated too.)
Repeat steps 6-7 removing one weight from the stack each time. Remember to attach each weight to the glider as it is removed from the weight stack.
newton's third law
when ever two objects interact, they exert equal and opposite forces on each other (the force is equal in magnitude but opposite in direction
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space
red shift
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As galaxies get further away, there red-shift becomes more which means they are moving faster
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springs
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force and elasticity
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required practical
method
- Secure a clamp stand to the bench using a G-clamp or a large mass on the base.
- Use bosses to attach two clamps to the clamp stand.
- Attach the spring to the top clamp, and a ruler to the bottom clamp.
- Adjust the ruler so that it is vertical, and with its zero level with the top of the spring.
- Measure and record the unloaded length of the spring.
- Hang a 100 g slotted mass carrier - weight 0.98 newtons (N) - from the spring. Measure and record the new length of the spring.
- Add a 100 g slotted mass to the carrier. Measure and record the new length of the spring.
- Repeat step 7 until you have added a total of 1,000 g.
anlysis
For each result, calculate the extension: extension = length - unloaded length
Plot a line graph with extension on the vertical axis, and force on the horizontal axis. Draw a suitable line or curve of best fit.
Identify the range of force over which the extension of the spring is directly proportional to the weight hanging from it.
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