Name
Date
Work and the Work-Energy Theorem — Homework
Check the angle between force and motion before deciding whether cos(theta) changes anything.
- 1.A 60 N horizontal force pushes a box 5 m in the same direction as the push. Find the work done.
- 2.A rope pulls a sled with 30 N at 37 degrees above horizontal, moving it 12 m horizontally. Find the work done by the rope.
- 3.A net force does 720 J of work on an 8 kg object starting from rest. Find its final speed.
- 4.Explain why a person holding a heavy box perfectly still does zero physics-work on it, no matter how tired they get.
- 5.Describe a real activity where the force and the direction of motion are NOT aligned, and estimate whether the resulting work is more, less, or the same as if they were perfectly aligned.
🌲 Homeschool of the FutureEleventh Grade · Science · week 15 homework