791465
Descrição
FlashCards por rcmwilliams, atualizado more than 1 year ago
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Criado por rcmwilliams
mais de 10 anos atrás
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| Questão | Responda |
| What is speed and velocity? | How fast you are going |
| What are the units of measure? | m/s |
| How is velocity different to speed? | Velocity, as a vector, has magnitude and direction. It is a measure of the rate at which an object changes position. To describe a car's velocity you would have to state it as 70 miles per hour, south. |
| What is the formula for average speed? | average speed = distance travelled / time taken |
| What is acceleration? | How quickly velocity is changing. Can be change in speed or direction. |
| What are the units of measure for acceleration? | m/s 2 (REMEMBER THE SQUARED BIT!!!) |
| What is the formula for acceleration? | Acceleration = Change in velocity / Time Taken. final velocity - initial velocity / time taken. (v - u) / t |
| How do you calculate distance travelled | Distance = average speed × time However, you need to know the average speed to use it. If the speed changes from one speed to another, you use this equation: d = (u + v) ÷ 2 × t and Time = distance ÷ average speed t = (2 × d) ÷ (u + v) |
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