Two cars have a ‘rear end' collision. A 1200 kg Honda moving at 20.0 m/s strikes a 1000.0 kg Ford moving at 15 m/s. Their bumpers become locked and they continue to
move as one mass. What is their final velocity?

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Ahypothesis is? close agreement by competent observers of observations of the same phenomena. a guess that has been tested over and over again and always found to be true. an educated guess that has yet to be proven by experiment. the long side of a right triangle. a synthesis of a large collection of information that includes guesses.

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant