Podcast
Questions and Answers
What is the kinetic energy of the 50.0 g cannon shell traveling at 700 m/s?
What is the kinetic energy of the 50.0 g cannon shell traveling at 700 m/s?
- 350000 J
- 9800 J
- 245000 J
- 1715000 J (correct)
How much work is done in raising 100.0 kg for a potential difference of 196 N/kg?
How much work is done in raising 100.0 kg for a potential difference of 196 N/kg?
- 19600 J (correct)
- 9800 J
- 490 J
- 39200 J
For what potential difference must a 400 kg pile driver fall to do 15,000 J of work?
For what potential difference must a 400 kg pile driver fall to do 15,000 J of work?
- 300 m
- 150 m
- 37.5 m (correct)
- 75 m
How much work is needed to stop a 1400 kg truck traveling at 100 km/h?
How much work is needed to stop a 1400 kg truck traveling at 100 km/h?
What average braking force is required to stop a 2 tonne truck traveling at 80 km/h in 200 m?
What average braking force is required to stop a 2 tonne truck traveling at 80 km/h in 200 m?
In the given scenario, what is the kinetic energy of the mass $m$ when it reaches the surface?
In the given scenario, what is the kinetic energy of the mass $m$ when it reaches the surface?
What does the equation $KE_{surface} + PE_{surface} = KE_{height h} + PE_{height h}$ represent?
What does the equation $KE_{surface} + PE_{surface} = KE_{height h} + PE_{height h}$ represent?
What is the work done by the external force (gravitational attraction) on the mass $m$?
What is the work done by the external force (gravitational attraction) on the mass $m$?
What assumption is made about the gravitational field strength in the given scenario?
What assumption is made about the gravitational field strength in the given scenario?
Which assumption is made about the kinetic energy of the Earth in the given scenario?
Which assumption is made about the kinetic energy of the Earth in the given scenario?
