Which statement correctly describes speed?

[harimakenji]

Homework Statement

1. what are some uses of speed in daily life?

2. Which of the following is not a rate?
a. Amount of food consumed by each family member
b. Daily cargo handled at PSA
c. Petrol consumed per day
d. Speed

3. Which statement correctly describes speed?
a. The distance covered per 1 liter of petrol
b. The time taken to travel 1 m
c. The distance traveled in 1 second
d. The distance traveled at 1 m/s

Homework Equations

rate = an expression that shows how a quantity changes with time
Average speed = rate at which an object covers certain distance

The Attempt at a Solution

1. we need a high speed to win a car race. that's the only usage of speed that I can think of. Are there others?

2. a. not a rate because there is no information about time
b. rate. can be stated as number of cargo per day
c. rate
d. rate
Right or wrong?

3. a. not speed
b. not speed
c. speed
d. not speed
Right or wrong?

Thank you very much

 

[harimakenji]

hello

 

[arkofnoah]

wow this is really elementary science.

you're right for all.

 

[harimakenji]

wow this is really elementary science.

you're right for all.

yes I am in 9th grade

BTW, I am still need help for number (1). Thank you very much