### SAT Physics Conventions and Graphing - Practice Exercises

##
**SAT Physics Conventions and Graphing - Practice Exercises**

**Questions 1-2:**

**(A)**kg • m/s

^{2 }

**(B)**kg • m

^{2}/s

^{2 }

**(C)**kg • m

^{2}/s

^{3 }

**(D)**kg/m • s

^{2 }

**(E)**A • s

Select the combination of fundamental units above that should be used to answer each of the following questions about derived units.

- The formula for finding pressure is P = F⁄A. The derived unit for pressure is the pascal. Which combination of fundamental units is equivalent to a pascal?
- The formula for finding kinetic energy (K) is K=½ mv
^{2}. The derived unit for energy is the joule. Which combination of fundamental units is equivalent to a joule?

**Questions 3-4:**

refer to the following velocity-time graph.

**3.**Determine the magnitude of acceleration of the object when time t = 4 seconds.

**(A)**0 m/s

^{2 }

**(B)**2 m/s

^{2 }

**(C)**5 m/s

^{2 }

**(D)**10 m/s

^{2 }

**(E)**20 m/s

^{2}

**4.**Determine the displacement (change in position), Δx, of the object during the 5-second time interval.

**(A)**40 m

**(B)**60 m

**(C)**80 m

**(D)**100 m

**(E)**120 m

**5.**Which graph best represents the equation, p=I²R?

**6.**Which graph best represents the equation p = h/λ?

**7.**Which graph best represents the equation F = kx?

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