2 Fig. 3 shows two people, Sam and Tom, pushing a car of mass 1000 kg along a straight line \(l\) on level ground.
Sam pushes with a constant horizontal force of 300 N at an angle of \(30 ^ { \circ }\) to the line \(l\).
Tom pushes with a constant horizontal force of 175 N at an angle of \(15 ^ { \circ }\) to the line \(l\).
\begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{d5a09ed4-a32f-4ff7-aa08-6e54c2ab26a0-2_289_1132_571_507}
\captionsetup{labelformat=empty}
\caption{Fig. 3}
\end{figure}
- The car starts at rest and moves with constant acceleration. After 6 seconds it has travelled 7.2 m .
Find its acceleration.
- Find the resistance force acting on the car along the line \(l\).
- The resultant of the forces exerted by Sam and Tom is not in the direction of the car's acceleration. Explain briefly why.