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3 years ago

A car travels along a straight road at a steady 40 MPH.Are the forces on the car balanced or unbalanced? Explain.

Physics

1 answer:

Nutka1998 [239]3 years ago

8 0

They are balanced b/c the motion is constant

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Heat is transferred from molecules with more kinetic energy to molecules with _________kinetic energy.

Karolina [17]

Answer:

low

Explanation:

the higher the kinetic energy, the More the vibration of molecules, thus heat is more on the side with highly vibrating molecules

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2 years ago

One of the most important properties of materials in many applications is strength. Two of the qualitative measures of the stren

katrin2010 [14]

To solve this exercise it is necessary to take into account the concepts related to Tensile Strength and Shear Strenght.

In Materials Mechanics, generally the bodies under certain loads are subject to both Tensile and shear strenghts.

By definition we know that the tensile strength is defined as

$\sigma = \frac{F}{A}$

Where,

$\sigma =$ Tensile strength

F = Tensile Force

A = Cross-sectional Area

In the other hand we have that the shear strength is defined as

$\sigma_y = \frac{F_y}{A}$

where,

$\sigma_y =$ Shear strength

$F_y =$ Shear Force

$A_0 =$ Parallel Area

PART A) Replacing with our values in the equation of tensile strenght, then

$311*10^6 = \frac{F}{(15*10^{-6})(30*10^{-2})}$

Resolving for F,

$F= 1399.5N$

PART B) We need here to apply the shear strength equation, then

$\sigma_y = \frac{F_y}{A}$

$210*10^6 = \frac{F_y}{15*10^{-6}30*10^{-2}}$

$F_y = 945N$

In such a way that the material is more resistant to tensile strength than shear force.

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3 years ago

8 N to the left , and 4 N to the right. Find the net force. Is this balanced?

alukav5142 [94]

Explanation:

12N by first law of newton is net force after colloision

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2 years ago

Which statement best describes the benefits that would make the investment worthwhile?

Nadya [2.5K]

<span>Fusion produces large amounts of energy, and the fuel is found on Earth.</span>

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3 years ago

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How is it possible for two objects to have the same momentum, but different velocities?

coldgirl [10]

Answer: momentum has the same direction as that of velocity but when 2 bodies with the same linear momentum & different velocities it has different masses because a vector quantity is represented by a cross product of mass and velocity of object .

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2 years ago