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MrRa [10]
3 years ago
12

I need help with this

Physics
1 answer:
tangare [24]3 years ago
4 0

ABCD because the energy is transforming from potential to kinetic.

the potential is when it's resting at the top, the kinetic is as it goes downhill and gains speed.

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How can you find the net force if two forces act in opposite directions?
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Then the magnitude of the net force is the difference between the two forces,
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Which represents potential energy?
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C) is the correct answer.
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A train is approaching you at very high speed as you stand next to the tracks. Just as an observer on the train passes you, you
VashaNatasha [74]

Answer:

a) Your player

b) Observer's player

c) Each measures their own first

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In this case, the clock situated in the train will be running slow with respect to the stationary frame of reference

8 0
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
kari74 [83]

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

4.9g-T=4.9a

Tr=I\alpha

Where

\alpha=\frac{a}{r}

Tr=\frac{1}{2}m_1ra

T=\frac{1}{2}m_1a=\frac{1}{2}(3.3)a

Substitute the value

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

4.9\times 9.8=4.9a+\frac{3.3a}{2}

Where g=9.8 m/s^2

48.02=a(4.9+1.65)=6.55a

a=\frac{48.02}{6.55}=7.33m/s^2

Angular acceleration,\alpha=\frac{a}{r}=\frac{7.33}{0.8}=9.16rad/s^2

7 0
3 years ago
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