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2 years ago

Is kinetic energy conserved in an inelastic collision.

1 answer:

5 0

The total kinetic energy before the collision is not equal to the total kinetic energy after the collision. A portion of the kinetic energy is converted to other forms of energy such as sound energy and thermal energy. A collision in which total system kinetic energy is not conserved is known as an inelastic collision.

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What I the Wannnsjsusbevdyx

Arada [10]

I have no idea what that is, but all of your answers right

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3 years ago

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What is the period of a wave that travels through a spring at 2.5 m/s and has a wavelength of 3m ?

Bond [772]

Answer:

Explanation:

where v is the velocity of the wave

is the wavelength.

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3 years ago

A 20-pound object is dropped from a 50-foot bridge onto the ground below it. A 50-pound object is dropped from a 100-foot cliff

Anvisha [2.4K]

Answer:

here 20 lb object will hit the ground first

Explanation:

Acceleration of the object while it is dropped in air is given as

$F = mg$

$a = \frac{F}{m}$

$a = g$

so acceleration of the object is independent of the mass of the object

now time to reach the ground is given as

$h = \frac{1}{2}gt^2$

$t = \sqrt{\frac{2h}{g}}$

for 20 pound object

$t_1 = \sqrt{\frac{2(50)}{32}}$

$t_1 = 1.77 s$

for 50 pound object

$t_2 = \sqrt{\frac{2(100)}{32}}$

$t_2 = 2.5 s$

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3 years ago

A uniform, thin rod of length h and mass M is held vertically with its lower end resting on a frictionless horizontal surface. T

saveliy_v [14]

Answer:

$v = \sqrt{gh}$

Explanation:

Since there's no external force beside gravity acting on the rod, we can use the law of energy conservation to calculate for the speed of rod center of gravity before hitting the surface.

Also as the rod is uniform and this, its center of gravity is at distance h/2 from the surface.

$E_k = E_p$

$mv^2/2 = mgh/2$

$v^2 = gh$

$v = \sqrt{gh}$

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3 years ago

Lightning is more likely to strike a metal tower than a rubber hose because:

Rudik [331]

This is because metal is a conductor of electricity while rubber is not (rubber is an insulator). Therefore the metal is more amenable to 'ground' the high charge in the lightning than rubber would. This is also why, when lightning strikes metal, it is safely 'grounded' while if it strikes a non-conductor, most occasionally, it explodes into a fire.

6 0

4 years ago