3 years ago

Which statement is true?

Physics

1 answer:

ser-zykov [4K]3 years ago

8 0

D is definitely the correct choice here.

I think a case could also be made for choice-B, but that would be a tough, complex operation.

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An object travels 20 m in 10s What is its speed?

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speed=distance/time

distance=20m

time=10s

speed=?

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3 years ago

When an object experiences uniform circular motion the direction of the net force is?

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How do i find stretch? The problem in questioning has already given me the elastic energy and k-value, but I have no idea how to

finlep [7]

Answer:

Stretch can be obtained using the Elastic potential energy formula.

The expression to find the stretch (x) is $x=\sqrt{\frac{2\times EPE}{k}}$

Explanation:

Given:

Elastic potential energy (EPE) of the spring mass system and the spring constant (k) are given.

To find: Elongation in the spring (x).

We can find the elongation or stretch of the spring using the formula for Elastic Potential Energy (EPE).

The formula to find EPE is given as:

$EPE=\frac{1}{2}kx^2$

Rewriting the above expression in terms of 'x', we get:

$x=\sqrt{\frac{2\times EPE}{k}}$

Example:

If EPE = 100 J and spring constant, k = 2 N/m.

Elongation or stretch is given as:

$x=\sqrt{\frac{2\times EPE}{k}}\\\\x=\sqrt{\frac{2\times 100}{2}}\\\\x=\sqrt{100}=10\ m$

Therefore, the stretch in the spring is 10 m.

So, stretch in the spring can be calculated using the formula for Elastic Potential Energy.

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3 years ago

Classyfying— what is the name of the force you exert on a sponge when you squeeze it?

Kruka [31]

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