Your shoulders are not supposed to touch the backrest when driving. However, if they do it’s not a huge deal. You wouldn’t be arrested for it.
Im not sure but ill message u the answer when i get it
The equivalent to this expression is 4 (21 + 4)=84+16
Hope this helps :)
Suppose the force acting on a tennis ball (mass 0.060 kg) points in the +x direction and is given by the graph of the figure as a function of time.