## SAT Physics Conventions and Graphing - Practice Exercises

Questions 1-2:
(A) kg • m/s2
(B) kg • m2/s2
(C) kg • m2/s3
(D) kg/m • s2
(E) A • s
Select the combination of fundamental units above that should be used to answer each of the following questions about derived units.
1. 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?
2. The formula for finding kinetic energy (K) is K=½ mv2. 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/s2
(B) 2 m/s2
(C) 5 m/s2
(D) 10 m/s2
(E) 20 m/s2

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? 