2 years ago

I NEED THIS A SOON AS POSSIBLE

2 answers:

6 0

Work is done when spring is extended or compressed. Elastic potential energy is stored in the spring. Provided inelastic deformation has not happened, the work done is equal to the elastic potential energy stored.

ludmilkaskok [199]2 years ago

5 0

Answer: c) 1.0 N/m constant spring stretched 0.3 m.

Explanation:

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finlep [7]

Answer:Force is to the right

Explanation: because the right side has 75N compared to the 25N on the left.

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2 years ago

A single frictionless roller-coaster car of mass m = 750. kg tops the first hill with speed v = 15.0 m/s at height h = 20.0 m as

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2 years ago

Water from a fire hose is directed horizontally against at a rate of 50.0 kg/s and a speed of 42.0 m/s.

ss7ja [257]

Answer:

Force, |F| = 2100 N

Explanation:

It is given that,

Water from a fire hose is directed horizontally against at a rate of 50.0 kg/s, $\dfrac{m}{t}=50\ kg/s$

Initial speed, v = 42 m/s

The momentum is reduced to zero, final speed, v = 0

The relation between the force and the momentum is given by :

$F=\dfrac{p}{t}$

$F=\dfrac{mv}{t}$

$F=50\ kg/s\times 42\ m/s$

|F| = 2100 N

So, the magnitude of the force exerted on the wall is 2100 N. Hence, this is the required solution.

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2 years ago

How much potintial energy is in a closed system where the height of the object is 2 m, and the mass is 10 kg?

Lorico [155]

Answer:

D. 196 J

Explanation:

PE=mgh=10×9.8×2=196J

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2 years ago

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The similarity is that they both are types of bonds in molecules.
Ionic bonds are between a metal and a nonmetal.
Covalent bonds are between two nonmetals.

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3 years ago