7. Sarah pulls her sister in a wagon (combined mass of 50 kg) a horizontal distance of 25 m. If she pulls with a force of 40 N at an angle of 36 degrees with the horizontal distance, how much work does she do. If she starts from rest, what is her power generated

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

What practical value did astronomy offer to ancient civilizations?

The motion of water in a dam serves human beings by generating electricity as it is a controlled motion. give one example for an uncontrolled motion. what effects could it cause