Answer needed asap.
the driver of an suv (m = 1700 kg) isn't paying attention and rear-ends a car (m = 950kg) on level ground at a red light. on impact, both drivers lock their brakes. the suv and car stick together and travel a distance of 8.2 m before they come to a stop. how fast was the suv traveling just before the collision?

Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.