The following are four different relations about displacement, velocity, and acceleration for the motion of a particle in general. Choose the incorrect statement(s):
a. | \(v_{avg}=\frac{1}{2} [ v(t_{1})+v(t_{2}) ]\) |
b. | \(v_{avg}=\frac{r(t_{2})-r(t_{1})}{t_{2}-t_{1}}\) |
c. | \(r=\frac{1}{2}[ v(t_{2})-v(t_{1}) ](t_2-t_1)\) |
d. | \(a_{avg}=\frac{v(t_{2})-v(t_{1})}{t_{2}-t_{1}}\) |
1. | (a), (d) |
2. | (a), (c) |
3. | (b), (c) |
4. | (a), (b) |