5.2 Newton's First Law

A skydiver opens their parachute, and shortly thereafter, they are moving at constant velocity. (a) What forces are acting on them? (b) Which force is bigger?

A woman was transporting an open box of cupcakes to a school party. The car in front of her stopped suddenly; she applied her brakes immediately. She was wearing her seat belt and suffered no physical harm (just a great deal of embarrassment), but the cupcakes flew into the dashboard and became “smushcakes.” Explain what happened.

While sliding a couch across a floor, Andrea and Jennifer exert forces $\overset{\rightarrow}{F}_{\text{A}}$ and $\overset{\rightarrow}{F}_{\text{J}}$ on the couch. Andrea’s force is due north with a magnitude of 130.0 N and Jennifer’s force is $32 °$ east of north with a magnitude of 180.0 N. (a) Find the net force in component form. (b) Find the magnitude and direction of the net force. (c) If Andrea and Jennifer’s housemates, David and Stephanie, disagree with the move…