4. If you lift a 30 kg weight 0.5 meters. How much Potential energy has it
gained?
Note:- Use g = 10 m/s?
a 150 J
b 60 J
C 180 J
d 100 J

If anyone who can me with this hw? i would really appreciate it

You want to move a heavy box with mass 30.0 kg across a carpeted floor. you pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 n, causing the box to move horizontally. the force of friction between the moving box and the floor has magnitude 41.5 n . what is the box's acceleration just after it begins to move

Which research method uses information that governments, businesses, and educational institutions have already made available for public use? survey correlational research cross-cultural research secondary analysis