15 Questions
According to the text, what is the definition of work in physics?
The application of force over a distance to a system
In the example given in the text, if a force of 50 Newtons is used to pull a box for 5 meters, how much work is done on the box?
250 Newton-meters
What is the relationship between work and the conservation of energy?
Work can be converted into energy
Which equation can be used to calculate the work done on an object when a constant force is applied over a certain distance?
Work = force x distance x cosine(theta)
What is the equation for kinetic energy of an object?
Kinetic energy = mass x velocity^2
What is potential energy?
Energy that is potentially work
Which equation represents the potential energy of an object due to gravity?
$PE = mgh$
What is the equation for the potential energy of a spring?
$PE = \frac{1},{2}kx^2$
What is the equation for average power?
$P_{avg} = \frac{W},{\Delta t}$
Which equation describes the relationship between work, force, and distance?
$work = force \times distance$
Which equation describes the relationship between average velocity, distance, and time?
$average\ velocity = distance \div time$
What is power defined as?
The net force applied to something with a particular average velocity.
If a box is moved 5 meters in 2 seconds and the average velocity is 2.5 meters per second, what is the average power output if a force of 50 Newtons is applied?
125 Watts
Are the two equations for average power describing the same relationship?
Yes
What is power commonly used to calculate in the context of electricity?
How energy moves around in a circuit
Test your knowledge on gravitational potential energy and how to calculate it in this quiz. Learn about the key formula and understand how gravity affects an object's energy.
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