Difference between revisions of "Velocity"
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+ | ===References=== | ||
+ | ====AQA==== | ||
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+ | :[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Velocity, pages 117, 148, GCSE Physics, Hodder, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Velocity, pages 136-141, 144-155, 157, GCSE Physics; Third Edition, Oxford University Press, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Velocity, pages 141, 143, 146-9, 182-3, GCSE Physics; Student Book, Collins, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Velocity, pages 147, 178-180, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1782946403/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946403&linkCode=as2&tag=nrjc-21&linkId=32a0abb60dff015b15b50e9b1d7b4644 ''Velocity, pages 147-149, GCSE Combined Science Trilogy; Physics, CGP, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Velocity, pages 207, 226, GCSE Combined Science Trilogy 2, Hodder, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe10398 ''Velocity, pages 208, 210, 211, GCSE Combined Science; The Revision Guide, CGP, AQA ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac480 ''Velocity, pages 60, 61,62, GCSE Physics; The Revision Guide, CGP, AQA ''] |
Revision as of 17:20, 14 November 2019
Contents
Key Stage 3
Meaning
Velocity is very similar to speed but it includes the direction an object is moving.
Key Stage 4
Meaning
Velocity is a vector quantity describing the speed and direction of a moving object.
About Velocity
- Velocity is a scalar because it has magnitude and direction.
- The SI Unit for the magnitude of velocity is metres per second (m/s).
- Velocity is different from its scalar counterpart 'speed' because speed does not include the direction of travel.
- The velocity of an object can change while the speed remains constant.
Equation
Velocity = (Displacement) / (time)
\(v = \frac{s}{t}\)
Where
\(v\) = Velocity of the object.
\(s\) = The displacement between the starting point and end point of a journey.
\(t\) = The time taken between the two points.
Example Calculations
A wave travels 1000m in a time of 12.5s. Calculate the magnitude of the velocity of the wave correct to two significant figures. | The Moon is approximately 390,000km away from the Earth. It takes a Radio Wave 1.3 seconds to travel that distance. Calculate the magnitude of the velocity of the Radio Wave correct to two significant figures. | An alpha particle can travels around 6cm from a source taking 4.0ns before colliding with an air molecule. Calculate the magnitude of its velocity on this journey correct to two significant figures. |
1. State the known quantities
s = 1000m t = 12.5s |
1. State the known quantities
s = 390,000km = 390,000,000m t = 1.3s |
1. State the known quantities
s = 6cm = 0.06m t = 4.0ns = 4.0 x 10-9m |
2. Substitute the numbers into the equation and solve.
\(v = \frac{s}{t}\) \(v = \frac{1000}{12.5}\) \(v = 80m/s\) |
2. Substitute the numbers into the equation and solve.
\(v = \frac{s}{t}\) \(v = \frac{390000000}{1.3}\) \(v = 300,000,000m/s\) |
2. Substitute the numbers into the equation and solve.
\(v = \frac{s}{t}\) \(v = \frac{0.06}{4.0 \times 10^{-9}}\) \(v = 15,000,000m/s\) |
References
AQA
- Velocity, pages 117, 148, GCSE Physics, Hodder, AQA
- Velocity, pages 136-141, 144-155, 157, GCSE Physics; Third Edition, Oxford University Press, AQA
- Velocity, pages 141, 143, 146-9, 182-3, GCSE Physics; Student Book, Collins, AQA
- Velocity, pages 147, 178-180, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
- Velocity, pages 147-149, GCSE Combined Science Trilogy; Physics, CGP, AQA
- Velocity, pages 207, 226, GCSE Combined Science Trilogy 2, Hodder, AQA
- Velocity, pages 208, 210, 211, GCSE Combined Science; The Revision Guide, CGP, AQA
- Velocity, pages 60, 61,62, GCSE Physics; The Revision Guide, CGP, AQA