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3 years ago

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If a cheetah goes from 10 m/s to 30 m/s in 5 seconds, what was her acceleration?

2 answers:

grandymaker [24]3 years ago

5 0

Explanation:

Y CHETOS XDXDXX

CDXCVHH

Ierofanga [76]3 years ago

3 0

Yea i i didn’t see her last name but yet bbbsnsnsnsnddx i was talking abt it to see if he could see her what she was going on with lol but i yea i she said she was like he didn’t do that too but he said it ain’t no big do but it was a weird thing

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A 23 g bullet traveling at 230 m/s penetrates a 2.0 kg block of wood and emerges cleanly at 170 m/s. If the block is stationary

Ann [662]

The distance traveled by the wood after the bullet emerges is 0.16 m.

The given parameters;

<em>mass of the bullet, m = 23 g = 0.023 g</em>
<em>speed of the bullet, u = 230 m/s</em>
<em>mass of the wood, m = 2 kg</em>
<em>final speed of the bullet, v = 170 m/s</em>
<em>coefficient of friction, μ = 0.15</em>

The final velocity of the wood after the bullet hits is calculated as follows;

$m_1u_1 + m_2 u_2 = m_1v_1 + m_2v_2\\\\0.023(230) + 2(0) = 0.023(170) + 2v_2\\\\5.29 = 3.91 + 2v_2\\\\2v_2 = 1.38\\\\v_2 = \frac{1.38}{2} = 0.69 \ m/s$

The acceleration of the wood is calculated as follows;

$\mu = \frac{a}{g} \\\\a = \mu g\\\\a = 0.15 \times 9.8\\\\a = 1.47 \ m/s^2$

The distance traveled by the wood after the bullet emerges is calculated as follows;

$v^2 = v_0^2 + 2as\\\\v^2 = 0 + 2as\\\\v^2 = 2as\\\\s = \frac{v^2}{2a} \\\\s = \frac{(0.69)^2}{2(1.47)} \\\\s = 0.16 \ m$

Thus, the distance traveled by the wood after the bullet emerges is 0.16 m.

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7 0

3 years ago

150c passes through cell in 30 seconds. cell has a potential difference of 12v. what is current in the circuit

zzz [600]

The current in the circuit is 5 A

Explanation:

The intensity of current is given by the equation:

$I=\frac{q}{t}$

where

I is the current

q is the amount of charge passing through a given point of the circuit in a time interval of t

For the cell in this problem, we have

q = 150 C is the charge

t = 30 s is the time interval

Substituting into the equation, we f ind

$I=\frac{150}{30}=5 A$

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Explanation:

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Alinara [238K]

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