Question

1 A physical quantity is measured as -10m/s. Is it speed or velocity? 2 An object travels 20m in 2s and then another 16 m in 2s. What is the average speed of the object

Answer 1

Answer:

1. Velocity

2. 9 m/s

Explanation:

1. It is velocity, because '-' sign shows that it has direction and it is a vector quantity.

2. Avg speed = Total distance / Total time

= (20 + 16) / (2 + 2)

= 36 / 4 = 9 m/s

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Answer 2

Answer:

(1) velocity, (2) 9m/sec

Explanation:

(1) velocity ( -ve sign represents a vector quantity)

(2) average speed = total distance/ total time

= 36/4 = 9 m/sec

hope this helps you