A 50-kilogram student stands in an elevator. How much force does she exert on the elevator floor if the elevator is stationary?Gravitational force:The force experienced by an object, when it comes in the region of gravity is known as ...
A 1,200-kg car accelerates at 5.85 m/s2. If the coefficient of friction acting on the car is roughly 0.24, how much force does the engine exert? How much energy would be generated if a physics student (mass = 62 kg) could be completely turned into energy?
While Kepler's idea of a solar wind has been disproven, scientists have since discovered that sunlight does exert enough force to move objects. To take advantage of this force, NASA has been experimenting with giant solar sails that could be pushed through the cosmos by light. There are ...
Much of the effectiveness of mass dampers is a unique substance called magnetorheological fluid (MR fluid). This fluid is used inside large dampers to stabilized buildings during earthquakes. MR fluid is a liquid that changes to a near-solid when exposed to a magnetic force, then back to liqui...
Global forests are worth as much as $150 trillion—nearly double the value of global stock markets. The Forest Imperative The world’s forests—which today cover 30% of the earth’s land surface—are an incredibly valuable resource, storing massive amounts of carbon, helping to purify water...
Zajac FE ( 1992 ) How musculotendon architecture and joint geometry affect the capacity of muscles to move and exert force on objects: a review with application to arm and forearm tendon transfer design . J Hand Surg 17 ( 5 ), 799 – 804 ....
When customers have more strength, they can exert pressure on businesses to provide better products or services at lower prices. This force intensifies under certain conditions: The number of buyers: Fewer buyers mean more power. In sectors like aerospace manufacturing, each major airline (the indus...
Returning boomerangs are not suited for hunting -- they are very hard to aim, and actually hitting a target would stop them from returning to the thrower, pretty much defeating the purpose of the design. Returning boomerangs evolved out of non-returning boomerangs. These are also curved piece...
Apparently, these bad habits may generate negative impacts. To begin with, they may impair students’ physical health and psychological fitness. In addition, what worries many teachers is that they may also exert negative influences on students’ academic performance. To conclude, never can we turn...
This study tests hypotheses about the origins of bad teeth and good teeth. In the process, we show how cultures exert 'causal force' and produce what, following the lead of the dental professionals and dental patients who served as our research participants, we call 'bad teeth. We conducted...