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3 years ago

7

A 2-kg ball rolls at a speed of 10 m/s on the ground. Is this an example of Kinetic Energy, Potential Energy, or both?

1 answer:

nadya68 [22]3 years ago

3 0

If a 2kg ball rolls at a speed of 10 m/s on the ground, this is an example of kinetic energy. When a mass of the body moves at a specific rate, there is movement. The equation for kinetic energy is 1/2mv^2. Therefore the kinetic energy of the ball is (1/2)(2kg)(10m/s)^2 is 100 Joules.

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4. The Mariana trench is in the Pacific Ocean and has a depth of approximately 11,000 m. The density of seawater is approximatel

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Explanation:

It is known that relation between pressure and density is as follows.

P = $\rho gh$

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2 years ago

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A 25 kg block is held against a compressed spring and then the spring is allowed to decompress giving the block a velocity. The

Alex787 [66]

Answer:

h=18.05 cm

Explanation:

Given that

m= 25 kg

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x=26.4 cm

θ= 19.5 ∘

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From energy conservation

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$Kx^2=mv^2$

$v=\sqrt{\dfrac{kx^2}{m}}$

By putting the values

$v=\sqrt{\dfrac{kx^2}{m}}$

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When block reach at the maximum height(h) position then the final speed of the block will be zero.

We know that

$V_f^2=V_i^2-2gh$

By putting the values

$0^2=1.9^2-2\times 10\times h$

h=0.1805 m

h=18.05 cm

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3 years ago