What is work in physics?
The product of a constant force and displacement in the force's direction.
What is the formula for work done by a constant force in x direction?
How is displacement vector expressed for motion along x direction?
When is work positive regarding force and displacement directions?
Work is positive when force and displacement point in the same direction.
When is work negative regarding force and displacement directions?
Work is negative when force opposes displacement.
What is the sign of work if and displacement is positive?
The work is negative.
What is the sign of work if both force component and displacement are positive?
The work is positive.
What type of quantity is work?
Work is a scalar quantity.
Can work have a negative value?
Yes, work can have a negative value.
What is the SI unit of work?
The joule.
How is one joule defined in terms of newtons and meters?
One joule equals one newton-meter.
What are the SI units of work based on force and distance?
Newtons multiplied by meters.
What does the work correspond to on a force-position graph for constant force?
The area under the force-versus-position graph between initial and final positions.
What shape represents the area under a constant force-position graph?
A rectangle.
How is the area under the force-position graph calculated for constant force?
By multiplying the force by the displacement.
Test your knowledge with 8 questions on Work by a Constant Force.
1. A force acts opposite to an object’s displacement. What sign does the work done by that force have?
2. What quantity is represented by the area under a force-versus-position graph between an initial and a final position?
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