Calculate from power into other power unit measures. How much work can this machine do in 1 second ? Answer should be in Newtons/ 4 meters. However, forces coming from the side – or shear forces – are trouble for any kind of lengthy bone. The femur, or thigh bone, is the toughest bone in the body to break. RELATED: 3D-Printed 'HyperElastic Bone' Could Quickly Mend Breaks. The power of a machine is 4 kilowatts. I noticed that more power is required to do the same work in less time. Diferent power units conversion from Newton metre per second to joules per second. It takes John 2 seconds to lift a 100-kg barbell a distance of 20 centimeters. The twig metaphor is again handy, if disturbing: Imagine breaking a bundle of twigs in half. Problem # 3: The power of a machine is 4 kilowatts. A joule (J) is a unit of energy and a newton (N) is a unit of force. In addition to the amount of force applied, the angle of blow can make all the difference as to whether a particular bone will break. ©2020 Group Nine Media Inc. All Rights Reserved. In other words, a single Newton is equal to the force needed to accelerate one kilogram one meter per second squared. It can also be defined as the heat energy dissipated by a current of one ampere passing through a one Ohm resistor for one second . Star Wars firm fined £1.6m over Harrison Ford injury, Brute Force: Humans Can Sure Take a Punch, Bone Resilience Depends on Angle of Attack. The joule (symbol J, also called newton meter, watt second, or coulomb volt) is the SI unit of energy and work. How much power is required to do 200 joules of work in 4 seconds?What if you do the same work in 2 seconds? The dense outer layer of your bones is made from columns of collagen and calcium phosphate, almost link a bundled collection of twigs. It's the largest and thickest bone, for two things, and it's also protected by all those leg muscles. Answer: How much work can this machine do in 1 second ? The collarbone, conversely, is relatively small and close to the surface of the skin, and therefore is one of the most commonly broken bones. It's true that calcium helps build strong bones. These units are NOT interchangeable. If you're looking for the specifics to snap a piece of your skeleton, it takes about 4,000 newtons of force to break the typical human femur. If you're in the market for a short answer, it takes about 4,000 newtons of force to break the typical human femur. Further Reading. 20 centimeters = 0.20 meters and 15 centimeters = 0.15 meters. This was 4000 joules of work. 1 watt is equal to 1 joule per second (J/s). These columns run vertically and as such are good at absorbing compressing forces. If you're in the market for a short answer, it takes about 4,000 newtons of force to break the typical human femur. It takes Peter 3 seconds to lift a 200-kg barbell a distance of 15 centimeters. It's all downhill from there. If the object is being moved horizontally, gravity is irrelevant. Other units of power include ergs per second (erg/s), horsepower (hp), and foot-pounds per minute . Amy Shira-Teitel, never afraid, investigates in today's DNews report. Great lesson about the law of reflection. Example of calculating Power Question: A weightlifter lifted 2000 newtons to a height of 2 metres. Below are some carefully selected power word problems to help you understand the concept of power in physics. Find the force that is required to lift 100 kg and 150 against gravity. It's the kind of question that isn't likely to occur to you unless you're a physician, medical researcher or professional wrestler: How much force does it take to break a bone, anyway? In addition to all this, bones vary in thickness and toughness from person to person, depending on age, diet and lifestyle.
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