Answer:
A
Explanation: A is a example of Air resistance force, which is a contact force.
Answer:
e=mc2 made to relate mass with energy . bcoz energy can neither b created nor b destroyed
To find out time, you put distance over speed. So you would have to put 150 over 50. You divide 150 by 50 and you would get 3. So your answer is 3 hours.
