Podcast
Questions and Answers
What is the maximum gravitational potential energy in the given scenario?
What is the maximum gravitational potential energy in the given scenario?
- 1.962 J
- 0.4905 J (correct)
- 0.25 J
- 9.81 J
What is the density of a material?
What is the density of a material?
- Extension per unit force
- Mass per unit area
- Force per unit area
- Mass per unit volume (correct)
What does Hooke's law state?
What does Hooke's law state?
- Extension is directly proportional to the force applied (correct)
- Extension is proportional to the cube of the force applied
- Extension is proportional to the square of the force applied
- Extension is inversely proportional to the force applied
What happens to the material when the force applied is beyond the elastic limit?
What happens to the material when the force applied is beyond the elastic limit?
What is the formula for Hooke's law?
What is the formula for Hooke's law?
What is tensile strain?
What is tensile strain?
What happens to the energy when a material is stretched elastically?
What happens to the energy when a material is stretched elastically?
What is the purpose of crumple zones in cars?
What is the purpose of crumple zones in cars?
What can be inferred from the shape of a stress-strain graph?
What can be inferred from the shape of a stress-strain graph?
What is the main difference between a force-extension graph and a stress-strain graph?
What is the main difference between a force-extension graph and a stress-strain graph?
What happens to the energy when a spring is stretched and then released?
What happens to the energy when a spring is stretched and then released?
What is the ultimate tensile stress (UTS) on a stress-strain graph?
What is the ultimate tensile stress (UTS) on a stress-strain graph?
What is the total energy in a system equal to?
What is the total energy in a system equal to?
What type of energy is transferred to when a ball is thrown up into the air?
What type of energy is transferred to when a ball is thrown up into the air?
What is the reason why the initial kinetic energy given to the ball is not equal to the maximum gravitational potential energy when the ball has stopped in mid-air?
What is the reason why the initial kinetic energy given to the ball is not equal to the maximum gravitational potential energy when the ball has stopped in mid-air?
What is the formula to calculate the change in gravitational potential energy?
What is the formula to calculate the change in gravitational potential energy?
What is the energy converted to when the ball falls back to the ground?
What is the energy converted to when the ball falls back to the ground?
Why is the effect of air resistance ignored in the example question?
Why is the effect of air resistance ignored in the example question?
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