Physics lovers..a, b, c, or d?

1:Objects on the moon's surface have an acceleration due to gravity one-sixth that on earth's. What would the 50 kg boy weight on the moon? A. 50 Newtons B. 83 newtons C. 330 Newtons D. 500 Newtons #2: An object on earth has a mass of 4 kg. If the object were located on another planet with a gravitational acceleration of one-half of the earth, then the mass and weight would be (kg,n). A. 2 kg, 4.9 n B. 4 kg, 4.9 n C. 4 kg, 9.8 n D. 4 kg, 19.6 n. #3: A boy with a mass of 50 kg jumps off a 30 kg boat, causing the boat to move to the right at 2 m/sec. The boy jumped with a velocity of ______. A. -1.2 m/sec B. 3.3 m/sec C. 1.1 m/sec D. 0.2 m/sec. #4: A 2 kg kart moving in a straight line hits a piece of modeling clay that has a mass of 1 kg and is at rest. After the collision, the cart and clay stick together and move at 1m/sec to the left. The initial velocity of the cart was ____m/sec to the left. A. 1 B. 1.5 C. 2 D. 2.5. #5: An object moves in uniform circular motion at 15 m/sec and takes 1sec to go two revolutions. The radius of this circle is_____. A. 1 m B. 1.2 m C. 2.4 m D. 16 m. #6:The distance from the earth to the sun is one astronomical unit (A.U.). This 1 A.U.= 93,000,000 miles. Jupiter is 5.2 A.U. How many miles is Jupiter from the sun? A. less than Mars B. 18,000,000 C. 93,000,000 D. 480,000,000. #8: It takes the earth one year to revolve around the sun at a distance of one A.U. If the planet were four A.U. from the sun, how many years would it take to make one orbit? A. 1 B. 2 C. 4 D. 8