Which of the following are the correct units for ACCELERATION? Choose all that apply.
m/s2
h
mm
mm/d2
pc
mi
NM
yd/d
km
ft/s
cm
min
The correct units for acceleration are:
- m/s2 (meters per second squared)
- mm/d2 (millimeters per day squared)
- ft/s2 (feet per second squared)
- cm/s2 (centimeters per second squared)
- km/h2 (kilometers per hour squared)
To determine which units are correct for acceleration, we need to understand what acceleration is and how it is measured.
Acceleration is the rate at which an object changes its velocity over time. It is measured in units of distance divided by time squared.
Let's analyze each of the provided units:
1. m/s^2 (meters per second squared): This is the correct unit of acceleration. It represents the change in velocity per second.
2. h (hours): Hours are a unit of time, not distance or distance divided by time squared. So, hours are not the correct unit for acceleration.
3. mm (millimeters): Millimeters represent a unit of distance, not distance divided by time squared. So, millimeters are not the correct unit for acceleration.
4. mm/d^2 (millimeters per day squared): This unit combines distance and time, but it is not the commonly accepted unit for measuring acceleration. The use of days as the time unit makes it uncommon, so mm/d^2 is not the correct unit for acceleration.
5. pc (parsecs): Parsecs are a unit of distance used in astronomy, not distance divided by time squared. So, parsecs are not the correct unit for acceleration.
6. mi (miles): Miles are a unit of distance, not distance divided by time squared. So, miles are not the correct unit for acceleration.
7. NM (nautical miles): Nautical miles are a unit of distance, not distance divided by time squared. So, nautical miles are not the correct unit for acceleration.
8. yd/d (yards per day): This unit combines distance and time, but it is not the commonly accepted unit for measuring acceleration. The use of days as the time unit makes it uncommon, so yd/d is not the correct unit for acceleration.
9. km (kilometers): Kilometers are a unit of distance, not distance divided by time squared. So, kilometers are not the correct unit for acceleration.
10. ft/s (feet per second): This is the correct unit of acceleration. It represents the change in velocity per second.
11. cm (centimeters): Centimeters represent a unit of distance, not distance divided by time squared. So, centimeters are not the correct unit for acceleration.
12. min (minutes): Minutes are a unit of time, not distance or distance divided by time squared. So, minutes are not the correct unit for acceleration.
Based on the analysis above, the correct units for acceleration are: m/s^2 and ft/s.