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Juliette [100K]

2 years ago

5

An object of mass 30 kg is falling in air and experiences a force due to air resistance of 50 newtons. Calcuate the acceleration

of the object

1 answer:

rjkz [21]2 years ago

6 0

Answer:

this answer you question

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pentagon [3]

Answer:

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4 0

1 year ago

Consider 2 steel rods, A and B, B has three times the area and twice the length of A, so young modulus of B will be what factor

AVprozaik [17]

Answer:

$\frac{Y}{Y_o}$ = 2/3

Explanation:

The yuong modulus of a rod is defined as the relationship between the tensile strength and the strain

Y = $\frac{ \frac{F}{A} }{\frac{\Delta L}{L_o} }$

let's use the subscript "o" for rod A

I = $\frac{ \frac{F}{A_o} }{ \frac{\Delta L}{L_o} }$

tells us that rod B has

A = 3 A₀

L = 2 L₀

we substitute

Y = $\frac{ \frac{F}{A} }{ \frac{\Delta L}{L} }$

Y = $\frac{ \frac{F}{3A_o} }{ \frac{\Delta L}{ 2L_o} }$

y = ⅔ $\frac{ \frac{F}{A_o}}{ \frac{\Delta }{L_o} }$

substituting the value of Y₀

Y = ⅔ Y₀

$\frac{Y}{Y_o}$ = 2/3

5 0

2 years ago

A racecar begins at rest and accelerates to 25 m/s at a rate of 6.25 m/s2. What distance does the racecar cover?

Vitek1552 [10]

Answer:

d.

50 m

Explanation:

v² = u² + 2as

s = (v² - u²) / 2a

s =(25² - 0²) / (2(6.25))

s = 50 m

7 0

2 years ago

Air, water and salt solution are given in the table.

Oxana [17]

Answer:

I need help

Explanation:

Albert tries to move a 200 N car and it moves 0 m. A tow truck tries to move the 200 N car and it moves 2 m off the ground onto the truck bed. Who put more work into moving the car? Explain your response using the space below. Be sure to show your calculations. *

7 0

2 years ago

5. Find the mass of a car that is traveling at a velocity of 35 m/s West.

sattari [20]

Answer:

m = 9795.9 kg

Explanation:

v = 35 m/s

KE = 6,000,000 J

Plug those values into the following equation:

$KE = \frac{1}{2} mv^{2}$

6,000,000 J = (1/2)(35^2)m

---> m = 9795.9 kg

3 0

2 years ago