We never think consciously about motion. How many times have we said something like: "I’m not strong enough to lift it!" or partied so hard we didn’t have enough energy to study for a test? Mechanics Part 1 will help us understand all this from the physical point of view. We will see what can cause, for example, a disc prolapse and to which mechanical loads our bodies are subjected. Here you can proceed to Mechanics Part 2.
Work is the result that takes place when a force is applied to an object to move it. Work can be measured by multiplying the force by the distance. It is closely related to energy. The concept referred to as work-energy principle states that an increase in the kinetic energy of an object is due to an equal amount of work performed on the object. The unit of work is the joule (J) which equals a newton-meter (N-m).
The lecture Power: Example by Jared Rovny is from the course Work.
Included Quiz Questions
A new conveyor system at the local packaging plan will utilize a motor-powered mechanical arm to exert an average force of 890 N to push large crates a distance of 12 meters in 22 seconds. Determine the power output required of such a motor.
During the Powerhouse lab, Harry runs up the stairs, elevating his 102 kg body a vertical distance of 2.29m in a time of 1.32 seconds at a constant speed. Determine the work done by Harry in climbing the stair case.
2.30 x 103 J.
4.3 x 103 J.
3.20x 103 J.
2.9 x 103 J.
1.73 x 103 J.
Author of lecture Power: Example
5,0 of 5 stars
5,0 of 5 stars
Subscribe to bookmark your content
Bookmarks will help you organize our more than 2000 medical videos,
and customize your learning experience for more efficiency and better results.
USMLE™ is a joint program of the Federation of State Medical Boards
(FSMB®) and National Board of Medical Examiners (NBME®). MCAT is a registered
trademark of the Association of American Medical Colleges (AAMC).
None of the trademark holders are endorsed by nor affiliated with Lecturio.