Please post your answers and replies to the discussion questions below What is the difference between...

Please post your answers and replies to the discussion questions below

What is the difference between speed and velocity?

What is acceleration?

Name 3 ways that velocity can change?

List three units that you might use to measure (a) speed; (b) velocity; (c) acceleration.

What is the average speed of a person who travels 10-m in 40-s?

Solutions

Expert Solution

1. difference between speed and velocity

speed - is rate of change of distance with respect to time

velocity - is rate of change of displacement wrt time.

speed - is scalar quantity

velocity - is vector quantity

speed- always positive

velocity - can be negative, or and positive

2. Rate of change of velocity with respect to time is called acceleration.

3. * when body is moving along a straight line its velocity can increase = speed up

* when body is moving along a straight line its velocity can decrease = slow down

* direction of motion may change = change its direction

4. speed units can be meter/second foot/second kilometer per hour miles per hour

velocity units can be meter/second foot/second kilometer per hour miles per hour (same as speed)

acceleration units can be meter/second square foot/second square kilometer per hour square

5. avearge speed = total distance travelled / total time taken = 10/40 = 0.25 m/s

genius_generous answered 1 year ago

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