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Kinetic and Potential Energy — Homework
Watch your exponents -- both KE and elastic PE use a squared quantity.
- 1.Find the kinetic energy of a 6 kg object moving at 4 m/s.
- 2.A 5 kg object is lifted 6 m above the ground. Find its gravitational potential energy.
- 3.A spring with k = 100 N/m is compressed 0.3 m. Find the force it exerts and the elastic potential energy stored.
- 4.Two identical balls move at 3 m/s and 9 m/s. How many times more kinetic energy does the faster ball have?
- 5.Explain why the choice of reference height for gravitational potential energy (the ground, a table, a windowsill) does not affect the physics of a problem.
- 6.Describe a real spring or elastic object (a trampoline, a bow, a rubber band) and explain, using Hooke's law, what happens to the force and the stored energy as you stretch or compress it further.
🌲 Homeschool of the FutureEleventh Grade · Science · week 16 homework