Practice Problems

1. Define work and derive its formula
2. Prove work-energy theorem
3. A $5 \, \text{kg}$ body moves at $4 \, \text{m/s}$. Find KE
4. A body falls from height $20 \, \text{m}$. Find velocity
5. Calculate work done by force at angle
6. Find energy stored in spring
7. Define power and derive formula
8. Distinguish conservative and non-conservative forces