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4 years ago

(12 points) When forces are UNBALANCED on an object, the object could: (Choose all that apply)

Physics

1 answer:

charle [14.2K]4 years ago

7 0

As per Newton's law when unbalanced force is acting on the object

$F = ma$

so acceleration of the object is given as

$a = \frac{F}{m}$

since object is accelerating here so we can say that due to unbalanced force there must be change in velocity of the object

So correct answer regarding change in velocity must be given as

3. Decelerate

4. Stop moving

5. Accelerate

7. Start moving

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1 year ago

Compared to yellow light, orange light has A. a shorter wavelength. B. a wavelength closer to that of gamma rays. C. the same fr

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D. A longer Wavelength

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3 years ago

Find the volume of cuboid of side 4cm. Convert it in SI form

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Answer:

0.000064 cubic meters.

Explanation:

Given the following data;

Length of side = 4 centimeters

Conversion:

100 centimeters = 1 meters

4 cm = 4/100 = 0.04 meters

To find the volume of cuboid;

Mathematically, the volume of a cuboid is given by the formula;

Volume of cuboid = length * width * height

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3 years ago

A 4.00-m long rod is hinged at one end. The rod is initially held in the horizontal position, and then released as the free end

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Answer:

The angular acceleration α = 14.7 rad/s²

Explanation:

The torque on the rod τ = Iα where I = moment of inertia of rod = mL²/12 where m =mass of rod and L = length of rod = 4.00 m. α = angular acceleration of rod

Also, τ = Wr where W = weight of rod = mg and r = center of mass of rod = L/2.

So Iα = Wr

Substituting the value of the variables, we have

mL²α/12 = mgL/2

Simplifying by dividing through by mL, we have

mL²α/12mL = mgL/2mL

Lα/12 = g/2

multiplying both sides by 12, we have

Lα/12 × 12 = g/2 × 12

αL = 6g

α = 6g/L

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α = 58.8 m/s² ÷ 4.00 m

α = 14.7 rad/s²

So, the angular acceleration α = 14.7 rad/s²

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3 years ago

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