As a pendulum swings back and forth, its total energy is 16 j. what is its potential energy at 3/4 its maximum height?

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?