What is the definition of balanced forces? i need help i cnt find the definition on dictionary.com

1 answer:

8 0

Any group of 2 or more forces is balanced if the sum of all of their strengths and directions adds up to zero. Here's an example that I just made up:. Take 50 ropes. Tie one end of every rope all together into one big fat knot, and then have a tug of war in 50 different directions. Get 10 football players and 40 cheerleaders to each take the end of one rope, then everybody spread out and start pulling. It's possible that if everybody stood in just the right place, they might all cancel each other out, and the big knot in the center might just hang there and not move at all ... just as if there was NO FORCE on it at all. If that happened, we would know that the group of 50 forces acting on the knot is "balanced".

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1 (KE, PE) An object of mass 90 lbm is projected straight upward from the surface of the earth and reaches a height of 900 ft wh

Natali5045456 [20]

Answer:

Initial kinetic energy will be 2608200 lbf-ft

Initial speed will be 240.7488 m/sec

Explanation:

We have given height h = 900 ft

Mass of the object m = 90 lbm

Acceleration due to gravity $g=32.2ft/sec^2$

Initial kinetic energy will be equal to potential energy of the object

So kinetic energy = potential energy = mgh $=90\times 32.2\times 900=2608200\ lbf-ft$

This energy is also equal to the initial kinetic energy

So $\frac{1}{2}mv^2=2608200$

$v=240.7488m/sec$

So initial velocity will be 240.7488 m/sec

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4 years ago

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Oksana_A [137]

Answer:

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3 years ago

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Lyrx [107]

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3 years ago

A 6.0 kg box slides down an inclined plane that makes an angle of 39° with the horizontal. If the coefficient of kinetic frictio

Blababa [14]

Answer:

(B) 1.6 m/s^2

Explanation:

The equation of the forces acting on the box in the direction parallel to the slope is:

$mg sin \theta - \mu N = ma$ (1)

where

$mg sin \theta$ is the component of the weight parallel to the slope, with m = 6.0 kg being the mass of the box, g = 9.8 m/s^2 being the acceleration of gravity, $\theta=39^{\circ}$ being the angle of the incline