# Speed/Velocity Help: Understand Distance, Units & Formulas

• Meme:D
In summary, speed and velocity are related concepts but have distinct differences. Speed measures the rate of motion while velocity also takes into account the direction of motion. The most common units for measuring these quantities are meters per second or kilometers per hour, although other units may also be used. The formula for calculating speed is distance divided by time. Velocity is different from acceleration in that it also considers changes in velocity over time. Both speed and velocity can be negative, indicating motion in the opposite direction of the positive value.
Meme:D
1. Speed equals ___________ of change of distance.

2. Which of the following units measure speed?
i. year per metre
ii. millimetre per day
iii. metre per kilogram
iv. litre per second
v. metre per hour

3. Choose the standard international unit for velocity.
i. km/h
ii. miles/h
iii. m/minute
iv. m/s

4. Convert the units of car speed to m/s.
i. 60km/h
ii. 80km/h
iii. 100km/h

A. 19.5m/s
B. 16.7m/s
C. 27.8m/s
D. 22.2m/s
E. 1666.7m/s

5. Match each non standard unit to the best listed use.

A. The speed at which the shoreline is eroded.
B. Measuring car speed.
C. Measuring the speed of a catapillar.
D. Describing the speed of light.

6. Speed and velocity are the same for a mousetrap car.

True
False

7. Choose the correct formula for converting a mousetrap car's speed (m/s) into km/hr

a. X 1000m/km then / 3600s/h
b. X 60s/min then / 1000m/km
c. X 1km/1000m X 60 s/min x 60 min/h
d. /60s/min then X 1000m/km

8. How far would you travel in a car if you you drove at 80 km/h for 1.5 h?

a. 53.3 km
b. 120 km/h
c. 120 km
d. 125 km

9. If you walked 10 km at an average speed of 4km/h how many hours did you walk for?

a. 2.5 km
b. 40 h
c. 3 h
d. 2.5 h

10. If a dolphin can swim up to a constant speed of 36km/h for 40 minutes, what is the maximum distance it could swim?

a. 24km
b. 27km
c. 21km
d. 30km

11. If a car traveling at 60km/h has to cover 12km how long will it take?

a. 720 min
b.12min
c. 15min
d. 1/4 h

12. Calculate the speed of a car if it travels 120km in 2 h.

a. 60km/h
b. 60km
c. 240km/h
d. 140km

13. What is the average speed of a marathon runner if she covers the 42km in 3 hours?

a. 15m/s
b. 20km/h
c. 14km/h
d. 126km/h
14. How fast is a sprinter running if he covers 100 metres in 10 seconds?

a. 100m/s
b. 1000m/s
c. 1m/s
d. 10m/s

15. Convert 11m/s from m/s to km/h.

a. 188km/h
b. 0.18km/h
c. 30.5km/h
d. 39.6km/h

16. Describe the average velocity of a person doing laps around an oval.

a. The person has a constant average velocity all the time after starting
b. The person's average velocity increases as they move away from the starting position but reduced back toward zero everytime they head back toward the starting position
c. The person's average velocity keeps increasing as they run further
d. It is not possible to describe their average velocity

Thanks so much.. and sorry for all the questions

1. Speed equals ___________ of change of distance.

I think its ''Time'' ?

2. Which of the following units measure speed? (These are the ones I think is correct)
i. year per metre
ii. millimetre per day
v. metre per hour

3. Choose the standard international unit for velocity.
iv. m/s

4. Convert the units of car speed to m/s.
i. 60km/h D. 22.2m/s
ii. 80km/h B. 16.7m/s
iii. 100km/h E. 1666.7m/s

6. Speed and velocity are the same for a mousetrap car.
>> False

7. Choose the correct formula for converting a mousetrap car's speed (m/s) into km/hr

b. X 60s/min then / 1000m/km

8. How far would you travel in a car if you you drove at 80 km/h for 1.5 h?

a. 53.3 km

9. If you walked 10 km at an average speed of 4km/h how many hours did you walk for?

d. 2.5 h

10. If a dolphin can swim up to a constant speed of 36km/h for 40 minutes, what is the maximum distance it could swim?

c. 21km

11. If a car traveling at 60km/h has to cover 12km how long will it take?

d. 1/4 h

12. Calculate the speed of a car if it travels 120km in 2 h.

a. 60km/h

13. What is the average speed of a marathon runner if she covers the 42km in 3 hours?

c. 14km/h

14. How fast is a sprinter running if he covers 100 metres in 10 seconds?

a. 100m/s

15. Convert 11m/s from m/s to km/h.

b. 0.18km/h

16. Describe the average velocity of a person doing laps around an oval.

a. The person has a constant average velocity all the time after starting

## 1. What is the difference between speed and velocity?

Speed refers to the rate at which an object is moving, while velocity refers to the rate at which an object is moving in a specific direction. In other words, velocity includes both speed and direction.

## 2. What units are used to measure speed and velocity?

The most common units for measuring speed and velocity are meters per second (m/s) or kilometers per hour (km/h). However, depending on the situation, other units such as miles per hour (mph) or feet per second (ft/s) may also be used.

## 3. What is the formula for calculating speed?

Speed is calculated by dividing the distance traveled by the time it took to travel that distance. The formula is: speed = distance / time.

## 4. How is velocity different from acceleration?

Velocity and acceleration are both measures of an object's motion, but they are different in one key aspect: acceleration also takes into account changes in velocity over time. In other words, acceleration refers to how an object's velocity is changing, while velocity refers to its constant speed and direction.

## 5. Can speed or velocity be negative?

Yes, both speed and velocity can be negative. This indicates that the object is moving in the opposite direction of the positive value. For example, if an object is moving east with a velocity of 10 m/s, a velocity of -10 m/s would mean the object is moving west.

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