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3 years ago

A 0.150 kg baseball has 118 j of KE. how fast is the ball moving?(unit=m/s)

Physics

1 answer:

MrRissso [65]3 years ago

4 0

Answer:

Explanation 118 = (1/2) * 0.15 * v² 118 = 0.075 * v² v² = 1573.33 m/s ... since KE = m/2*V^2 , then : V = √2KE/m = √20*118/1.5 = 39.67 m//sec ( 142.8 km/h ; 88.75 mph).:

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3 years ago

A light, flexible cable is wrapped around a solid cylinder with mass 3.3 kg and a radius of 0.8 meters. The cylinder rotates on

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Answer:

$9.16rad/s^2$

Explanation:

We are given that

Mass, $m_1=3.3 kg$

Radius,r=0.8 m

$m_2=4.9 kg$

Height,h=2.9 m

We have to find the angular acceleration of the cylinder.

According to question

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$Tr=I\alpha$

Where

$\alpha=\frac{a}{r}$

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Substitute the value

$4.9g-\frac{1}{2}(3.3a)=4.9a$

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3 years ago

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