- Research and describe three energy flow diagrams for converting solar energy into electrical energy.
- List five ways in which food you buy in a grocery store has an “energy content” other than the actual calories your body gets from eating the food.
- How does the Sun’s energy reach us?
- Mercury thermometers, once common in science classrooms, have been largely replaced due to safety concerns. The “fire diamond” and the global harmonization system (GHS) are two methods used to label a mercury hazard. Locate and reproduce images of both labels and evaluate their relative strengths and weaknesses.
- Identify the only career in the following list that does not require any knowledge of physics: optometrist, petroleum engineer, astronomer, industrial engineer, grocer, robotics designer, architect, and physical therapist.
- Research a physics-related career and develop a class presentation. The presentation should use digital media (text, graphics, audio, etc.) to illustrate your findings and provide interest.
- Rank the following scenarios in order of most energy to least energy.
- 1 kg block moving at 1 m/s on the ground
- 1 kg block at rest 1 m above the ground
- 1 kg block at rest on the ground but attached to a spring with k = 1 N/m that is stretched 1 m
- the work done to push the block a distance of 1 m with a force of 1 N
- What is the elastic potential energy of a rubber band with a spring constant of 25.0 N/m if it is stretched by 10.0 cm from its original length?
- If a box’s mass is cut in half, but the box is raised to a height four times higher, how does its potential energy change?
- A mobile that weighs 28 N is hanging 2 m below a ceiling that is 5 m high. What is its potential energy with respect to the floor, the ceiling, and a point at the same height as the mobile?
- What is the kinetic energy of a 6 kg bird moving at a speed of 15 m/s?
- What is the largest force that an energy source containing 100 J can exert continuously over a distance of 25 m?
- At what height would a 15 kg bird have a potential energy of 2,400 J?
- If you double the speed and mass of an object how does its kinetic energy change?
- A 1 kg ball and a 9 kg ball have the same Ek. Compare their speeds.
- A small airplane has a kinetic energy of 5,000,000 J when it travels at 100 m/s. What is its mass?
- A ball with a mass of 150 g rolls due north along the deck of an ocean liner at a speed of 2.0 m/s. The ocean liner is also moving north, with a speed of 10.0 m/s relative to a nearby island.
- What is the kinetic energy of the ball as measured from the reference frame of the ocean liner?
- What is the kinetic energy of the ball as measured from the reference frame of the island?
- How far is a spring extended if it has 1.0 J of potential energy and its spring constant is 1,000 N/m?
- How much work do you do when you push a 400 kg car for 6 m with a force of 300 N? What is the car’s final speed if all your work became kinetic energy?
- Relative to sea level, how much total mechanical energy does a plane with mass of 1,000 kg have when it moves at 235 m/s at an altitude of 2 km above sea level?