Final Google Docs sroom.google.com CESMTUMZAT 3/24 V/a/NIY3MTEZNIY30T 2.5 m Open with Weightlifter 15 kg 1.5 m 12. Calculate the force of Earth's gravity on the barbell. The formula for gravitational force near Earth's surface is F mg. Use g = 9.8 m/s². 13. What is the gravitational potential energy of the barbell? The formula for gravitational potential energy is GPE=mgh. 14. How much work did the weightlifter do to lift the barbell from the floor? Page 3 / 4 Q + 5 9 D 87 Littell, a division o 8 9

Assignment 19 1. Explain the relationship among gravitational force, weight, and acceleration due to gravity. 2. The gravitational potential energy of an object with constant mass m is equal to mgh. Explain how this quantity could decrease even if h increases. 3. Find the net gravitational force experienced by object A in the system below: 3m B 2 kg 5 kg 3m D 9 kg 7 kg 4. The acceleration due to gravity on the moon is just 1/6 that on Earth. a. What is the escape velocity from the moon's surface? b. What is the mass of an object weighing 326 N on its surface?

What is the height of an object that has a mass of 3.50 kg and a gravitational potential energy of 546 J? Select one: O a. b. 15.9 m 156 m C. 1530 m O d. 1911 m

The weight of an object by the sea is 2800 N. What is the weight of this object at a height with gravitational acceleration of 7.2 m/s? in terms of Newton, dyn, kgf and Ibf? If the velocity of this object at this height equals 22 m/s, what is the Kinetic Energy in terms of N.m, dyn.cm, kgf.m and Ibf.ft?