18 Questions
What is the maximum gravitational potential energy in the given scenario?
0.4905 J
What is the density of a material?
Mass per unit volume
What does Hooke's law state?
Extension is directly proportional to the force applied
What happens to the material when the force applied is beyond the elastic limit?
It deforms plastically
What is the formula for Hooke's law?
F = kΔL
What is tensile strain?
Extension over the original length
What happens to the energy when a material is stretched elastically?
It is stored as elastic strain energy
What is the purpose of crumple zones in cars?
To decrease the car's kinetic energy by doing work to deform plastically
What can be inferred from the shape of a stress-strain graph?
The material's ductility
What is the main difference between a force-extension graph and a stress-strain graph?
The object being described
What happens to the energy when a spring is stretched and then released?
It is converted into kinetic energy
What is the ultimate tensile stress (UTS) on a stress-strain graph?
The highest point on the graph, showing the maximum stress the material can withstand
What is the total energy in a system equal to?
Total energy out
What type of energy is transferred to when a ball is thrown up into the air?
Gravitational potential energy
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?
Work is being done by the ball to work against resistive forces
What is the formula to calculate the change in gravitational potential energy?
ΔEp = mgΔh
What is the energy converted to when the ball falls back to the ground?
Kinetic energy
Why is the effect of air resistance ignored in the example question?
To simplify the problem
This quiz covers the concepts of kinetic energy and gravitational potential energy, including calculations and formulas. It also touches on the properties of solids, including density and Hooke's law.
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