Amodel rocket is launched at an angle of 55 to the horizontal with a momentum of 20 kg-m/. if the vertical component of its velocity is 40 m/s what is the mass of the rocket?

Answer the above statement is ( false );

What is on your multiple choice anwers

Ke reqd to move from 0 to 50 will be proportional to 50x50 or 2500. this is equal to w.  to change vel from 50 to 150 you need energy prop to 22500 - 2500 = 20,000. this corresponds to 8w.  best answer is a) . work reqd is prop to velocity squared.