Physics : Work
A person lifts a package weighing 75N. If she lifts it 1.2m off the floor, how much work has she done?
0
Isaac Newton uncovered much of the relationship between forces, masses, and accelerations, but he missed the concept of ____.
Energy
___ is the capacity to do work.
Energy
Work is the product of the _____ exerted on an object and the distance that the object moves in the ____ of the force.
Force Displacement
The unit for wok is the newton meter, also known as the ____.
Joule
If the moon orbits the earth in a circle at a constant speed, does the earth's gravity do work on the moon?
No
Mr. Rees pushes against a wall and quickly becomes exhausted from the effort. Has Mr. Rees done work on the wall?
No
If you pull a wagon at a slightly upwards angle, which part of the force of your pull does work on the wagon as it roll on the ground?
The horizontal part
The___ that a force does on an object is calculated by multiplying the force times the displacement that the force causes.
Work
Which of the following are measured in joules?
Work and energy
A book falls off a table and free falls to the ground. Has work been done on the book?
Yes
A rocket accelerates through space. Has work been done?
Yes
