# I need help checking the answer

I need help checking the answer

I need help checking the answer
Name: _______________________________ Date: ________________________ Unit 1 Test Free Response 1) In a scheme to conquer the world, Lex Luther fires a missile from his mountain hide – out towards Los Angeles, which is 200,000 m west of the hi de – out. The missile travels in a straight line towards Los Angeles at a constant speed of 1250 m/s. Superman, who is in Los Angeles, sees the missile after 84 seconds while it is still 95,000 m away and flies east to meet the missile. A mere 30 seconds later, Superman catches the missile and quickly tosses it back at 3000 m/s towards Lex Luther’s hide – out and turns it into rubble. For the following questions let West be the positive direction. a) How much time passes from when the missile was launched unt il it hits the hide – out? b) What was the missile’s average speed over the entire time it was in the air? c) What was the missile’s average velocity over the entire time it was in the air? d) What was Superman’s average velocity in flying out to meet the missile? 2) Lance Armstrong decides to go for a bike ride. He starts at a speed of 10 m/s, but then decides to take an easy downhill ride. Once he starts downh ill he speeds up at a constant rate. The overall descent is 150m and takes him 10s. a) How fast is he going at the end of his descent? b) By what amount did his velocity increase every second?