A car has a mass of 2,000 kg . How much force is required to stop the car in 4.0 seconds from a speed of 20 m/s ?

The slope of a velocity time graph over any interval of time gives the during that interval

Alarge box of mass m is pulled across a horizontal frictionless surface by a horizontal rope with tension t. a small box of mass m sits on top of the large box. the coefficients of static and

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?