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dusya [7]
3 years ago
8

While doing bicep curls, Tamara applies 155 Newtons of force to lift the dumbbell. Her forearm is 0.366 meters long and

Physics
1 answer:
katrin2010 [14]3 years ago
8 0

Answer:

54.8 Nm

Explanation:

Torque is the cross product of the radius vector and force vector:

τ = r × F

Another way to write it is the product of the radius and force magnitudes times the sine of the angle between the vectors.

τ = rF sin θ

Here, r = 0.366 meters and F = 155 Newtons.  F is in the +y direction, and r is 15° below the +x axis, so the angle between the vectors is 90° − 15° = 75°.

τ = (0.366 m) (155 N) (sin 75°)

τ = 54.8 Nm

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mariarad [96]

Answer:

C. 500 watts

Explanation:

power is defined as the rate of work done

power=\frac{work.done}{time}

When a force causes a object to move, work is being done on the object by the force.

work.done=force*displacement\\=400*10\\=4000J

power=\frac{4000J}{8s}\\=500 W

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4 years ago
The largest origin of nonpoint pollution in the united states is A) rain B) industry C) agriculture
guajiro [1.7K]
The answer would be : A
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3 years ago
What is centripetal force
KonstantinChe [14]

Answer:

Centripetal force is defined as, "the force that is necessary to keep an object moving in a curved path and that is directed inward toward the center of rotation.

Explanation:

Just a few examples are the tension in the rope on a tether ball, the force of Earth's gravity on the Moon, friction between roller skates and a rink floor, a banked roadway's force on a car, and forces on the tube of a spinning centrifuge. Any net force causing uniform circular motion is called a centripetal force.

4 0
3 years ago
How does the law of conservation of mass relate to the nitrogen cycle
luda_lava [24]
<h2>Nitrogen is Conserved</h2>

Explanation:

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8 0
4 years ago
When Maggie applies the brakes of her car, the car slows uniformly from 15.3 m/s to 0 m/s in 2.23 s. How far ahead of a stop sig
nirvana33 [79]

Answer:

The answer is 34.119m

Explanation:

You need to pay attention to the word "uniformly". It means there is no acceleration thus the physics of this problem respond to the uniform rectilinear motion equations:

  • Xf = Xo + vt
  • v = constant
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  • Xf = Final position
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  • v = velocity (speed)
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Xf = 34.119m

3 0
4 years ago
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