What is necessary to designate a motion?                    …

What is necessary to designate a motion?                                                                                                          

A 2500 kg car accelerates from rest to 110 km/h in 5.2 s. (a…

A 2500 kg car accelerates from rest to 110 km/h in 5.2 s. (a).         What is the car’s acceleration in m/s 2 and in g’s?                                                                          (3.5 points)(b).         How fast is the car going after 3.5 s?                                                                                               (1.5 points)    

                     Extra Credit  An astronaut on a certain…

                     Extra Credit  An astronaut on a certain planet releases a 15 kg object from a height of 25 m above the surface and measures the time it takes for the object to hit the ground to be 1.97s. (i).  Calculate the acceleration due to gravity on this unknown planet.             (1.5 points)                                                                                                                                                                                                                                                                     (ii). At what speed does the object hit the surface of the planet?                                                                          (1.5 points)   (iii). What is the mass of the object just before it hits the floor of the planet?                                                        (1.0 point)