Weight = (mass) x (acceleration due to gravity)
= 90kg x 9.8ms-2
= 882N
A person whose mass is 90 kilograms is attracted to the earth's mass by a force
of 198.4 pounds (rounded). The earth is attracted to him by an equal force.
Mass is a quality of matter (apparently a construct of the Higgs field, but that's probably a little more answer than you were looking for). Weight is mass acted on by gravity. Mass is usually stated in units of kilograms. Weight can also be stated in kilograms, but is sometimes expressed in newtons. The mass stays constant, while the weight can change. If you are 90 kg, then on the moon your mass would still be 90 kg, but your weight would be one sixth of that, 15 kg. Weight is the force of attraction exerted on you by the moon or the earth, whichever you happen to be standing on. In science and engineering mass is described in kilograms, while weight (force) is measured in Newtons which goes back to Newton's second law of motion: force equals mass times the rate of change of momentum. In most cases that can be simplified to force equals mass times acceleration. A force of 1 Newton causes a 1 kg mass in free motion to increase its speed by 1 meter per second every second. In practice on the earth's surface a 1 kg mass has a weight of 9.81 Newtons, but in everyday language we say its weight is 1 kg because that works for everyone who is not an astronaut :).
Micrograms is a measure of weight or mass. 90 micrograms is equal to about 0.000003175 ounces.
A US gallon of 90 weight oil weighs approximately 6.8 pounds. An Imperial gallon of 90 weight oil weigh approximately 8 pounds.
WEIGHT is a VECTOR quantity .. because the weight has the direction into the surface of the earth to the down effected by the gravity .. but mass is a scalar quantity like 90 kg .. so .. WEIGHT IS VECTOR ..
You'll weigh about 90kg. Weight is the force of attraction between you and the Earth due to gravity. Mathematically, weight = GMm/r^2, where G is the gravitational constant, M is the mass of the Earth, m is your mass, and r is the distance from the center of the Earth to you. Earth has a radius of 3963 miles. When you are on the ISS, your radius from Earth's center is 4183 miles. Working out the math, objects 220 miles above Earth weigh about 90% of what they weigh on the surface. That said, you and the ISS are in constant free-fall toward Earth with zero relative motion between the two of you. The ISS isn't pushing against you like the surface of the Earth does, so you feel a sensation of weightlessness, despite having weight.
A student with a mass of 90 kg on the earth (gravity =9.8m/s/s) will have a weight of 882 Newtons. Weight = Mass * Gravity
A mass of 90 kg weighs 882 newtons (198.4 pounds) on the earth. (rounded)
On Earth, 90 kg of mass weighs 882 newtons (198.4 pounds).
On earth, 90 kg of mass weighs 882 newtons.
Weight = m g = (90 x 10) = 900 newtons
On my planet a man with a mass of 90 kg has a weight that is also 90 kg. On the Moon the same 90 kg man has a weight of 15 kg because the Moon is smaller and has less gravity. We distinguish between mass (amount of matter) and weight (a downward force) so that mass stays the same wherever the man is, even if his weight changes. Since Isaac Newton's time we know that force is equal to mass times acceleration, and the unit of force is defined technically as the force that accelerates a mass of 1 kg by 1 metre per second, every second. That amount of force is a Newton. If a 1-kg mass is dropped it will accelerate downwards at 9.806 metres per second per second, therefore the force on it is 9.806 Newtons. So the weight of a 90 kg man is technically described as 90 x 9.806 Newtons, in other words 882 Newtons. On the Moon his mass is still 90 kg but his weight is now only 147 Newtons.
Mass is a quality of matter (apparently a construct of the Higgs field, but that's probably a little more answer than you were looking for). Weight is mass acted on by gravity. Mass is usually stated in units of kilograms. Weight can also be stated in kilograms, but is sometimes expressed in newtons. The mass stays constant, while the weight can change. If you are 90 kg, then on the moon your mass would still be 90 kg, but your weight would be one sixth of that, 15 kg. Weight is the force of attraction exerted on you by the moon or the earth, whichever you happen to be standing on. In science and engineering mass is described in kilograms, while weight (force) is measured in Newtons which goes back to Newton's second law of motion: force equals mass times the rate of change of momentum. In most cases that can be simplified to force equals mass times acceleration. A force of 1 Newton causes a 1 kg mass in free motion to increase its speed by 1 meter per second every second. In practice on the earth's surface a 1 kg mass has a weight of 9.81 Newtons, but in everyday language we say its weight is 1 kg because that works for everyone who is not an astronaut :).
From Newton's second law, F=m*a (net force is the product of mass and acceleration).The mass here is 45 kg, and the acceleration is 2m/s2.Multiply the two together.
The person would be about 89 kilograms in weight. The person would still have a mass of 100 kilograms, of course. The strict scientific unit of weight is the "newton" because that is the unit of force and weight exerts a force. The 100 kg person weighs 890 newtons on Venus. However, normally we say "kilograms" or "kilograms weight", as long as we are clear that weight and mass are different.
Micrograms is a measure of weight or mass. 90 micrograms is equal to about 0.000003175 ounces.
10 chairs!
1 newton = 0.225 pounds force, so 400 newtons = about 90 pounds force. 1 pound-force ≡ 0.45359237 kg × 9.80665 m/s2 = 4.4482216152605 N (exactly) = 32.17405 lbm·ft/s2 Also, if you use Google search try typing in ' 1 N to pounds ' . You can use Google.com's search for all kinds conversion tasks.