In an experiment to measure current and voltage across a device, the following data was collected

$(V,I) = \left\{\right(0.1,26),)(0.2,48),(0.3,65),(0.4,90)\}$.

The current was measured in $mA$And the voltage in $mV$. The uncertainty in the current was $\pm 4mA$. Plot the current versus the voltage and draw the best-fit line through the points. Suggest whether the current is proportional to the voltage.

The following data was collected for current and voltage

$(V,I) = \left\{\right(0.1,27),(0.2,44),(0.3,60),(0.4,78\left)\right\}$

With uncertainty of $\pm 4mA$in the current. Plot the current versus the voltage and draw the best-fit line. Suggest whether the current is proportional to the voltage.

A body is acted upon by the two forces shown in the diagram. In each case draw the one force whose effect on the body is the same as the two together.

The diagram shows the velocity vector of a particle moving in a circle with speed $10 \mathrm{m} {\mathrm{s}}^{-1}$ at two separate points. The velocity vector is tangential to the circle. Find the vector representing the change in the velocity vector.