8. A car reaches 80 kilometers per hour, then
suddenly crashes into the concrete wall. Without
a seat belt, the crash test dummy slams into the
car's dashboard because
he crash test dummy's kinetic energy drops
I hear it many times

Which best represents the law of conservation of mass ?

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.