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kogti [31]
2 years ago
8

What does Kinetic Energy depend on

Physics
1 answer:
sweet-ann [11.9K]2 years ago
8 0
Since kintetic energy is the energy of motion it depends on the two mass affects inertia and inertia applies to kinetic energy. and speed is applied because the faster it going the more kinetic energy the object has.
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What happens in the crushing can experiment?
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Which of the following is a correct example of an action reaction pair?
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3 0
3 years ago
A horizontal bend in a pipeline conveying 1 m3/s of water gradually reduces from 600 mm to 300 mm in diameter and deflects the f
Brums [2.3K]

Answer:

The force excerted on the bend = 45.3 kN

This happens under an angle of tan^-1(1.7/4.2) = 22° to the x-direction

Explanation:

Step 1: Data given

A horizontal bend in a pipeline conveying 1m³/s of water

Diameter reduces from 600 mm to 300 mm

angle = 60°

At the larger end, the pressure = 170 KN/m²

Step 2:

1 m³/s = A1 *V1 = A2*V2

⇒ with A1 = the area at side 1

⇒ with A2 = the area at side 2

V1 = 1/((π/4)(0.6²)) = 3.537 m/s

V2 =  1/((π/4)(0.3²)) = 14.147 m/s

p1/p*g + (V1)²/2g = p2/p*g + (V2)²/2g

⇒ with p1 =170 *10³ N/m²

⇒ with p = 10³

⇒ with g = 9.81 m/s²

⇒ with p2 = TO BE DETERMINED

⇒ with V1 = 3.537 m/s

⇒ with V2 = 14.147 m/s

p2/fg = (170*10³)/(10³*9.81) + (3.537²)/(2*9.81) - (14.147²)/(2*9.81)

p2/fg = 7.767

p2 = 7.767 * 9810

p2 = 7.62*10^4 N/m²

Gravity forces are 0 along the horizontal plane. The only forces acting on the fluid mass = pressure and momentum forces.

Let's consider Fx and Fy as 2 components of total force F excerted by the bent boundary surface on the fluid mass.  

In x-direction we have: p1*A1 + Fx - p2A2cos∅ = pQ(V2cos∅ - V1)

In y-direction we have: 0 + Fy - p2A2sin∅ = pQ(V2sin∅-0)

Fx = 10³*(14.147cos60° - 3.537) + 7.62 * 10^4 * π/4 *(0.3²) * cos60° - 170*10^3 * π/4 *(0.6²)

Fx = -4.2 *10^4 N  (The negative sign shows the direction to the left)

Fy = 10³*(14.147sin60°) + 7.62 *10^4 * π/4 *(0.3²) *sin 60°

Fy = 1.7*10^4 N ( The positive sign shows the direction is upwards)

The law of motion says: the forces Rx and Ry excerted by the fluid on the bend will be equal and opposite to Fx and Fy:

Rx = -Fx = 4.2 *10^4 N ( positive sign means direction to the right)

Ry = -Fy = -1.7 *10^4 N  (Negative sign means direction downwards)

The resultant force on the bend:

R = √((Rx)² + (Ry)²

R = √((4.2 * 10^4)² + (-1.7*10^4)²)

R = 45310 N = 45.3 * 10³ N = 45.3 kN

The force excerted on the bend = 45.3 kN

This happens under an angle of tan^-1(1.7/4.2) = 22° to the x-direction

                       

           

5 0
3 years ago
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