Period 4 - GPE & KE Equations

Question of the Day

Today’s Objective:• You will be able to make calculations involving

gravitational potential energy and kinetic energy.

Gravitational Energy

Gravitational EnergyGay Wilkinson uses gunpowder to launch anvils up to 100 ft (30 m) into the air. Anvils weigh 100 lbs (the equivalent of 45 kg on Earth. How much energy does it take?

https://www.youtube.com/watch?v=MLejkyXbJlc



Kinetic Energy

Kinetic EnergyHow fast does a 50 gram arrow need to travel to have 40 joules of kinetic energy?

https://www.youtube.com/watch?v=1o9RGnujlkI



Elastic Energy

Elastic EnergyA bungee cord stretches 25 meters and has a spring constant of 140 N/m. How much energy is stored in the bungee?

https://www.youtube.com/watch?v=mKIWQaW7z7Q



Conservation of Energy

https://www.youtube.com/watch?v=mvA7AZEyciM

How much energy did Renaud Lavillenie have at the highest point? (Assume his center of mass reached the highest point.)





How fast did Renaud Lavillenie have to run to reach that height? (Assume no internal energy and the pole is weightless.)



Conservation of EnergyHow fast did Robbie Madison have to drive to reach the roof?






How fast was Robbie Madison moving when he landed?



Additional Practice:• Read p. 87 – 90• # 6.15 – 6.21

Period 4 - GPE & KE Equations

Education

Transcript of Period 4 - GPE & KE Equations