3 years ago

Jake, who weighs 680 newtons, climbs a 6-meter ladder in 8 seconds. What was Jake's power?

Physics

1 answer:

Jobisdone [24]3 years ago

7 0

I feel like it would be 536

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Answer:

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If a hammer has a resistance arm of 3 inches and the effort arm is 15 inches. What is the mechanical advantage?

Sunny_sXe [5.5K]

Answer:

Option D

MA=5

Explanation:

Mechanical advantage is the the ratio of the output force to the input force hence

$MA=\frac {Effort arm length}{Load arm length}$

Substituting 15 inches for the effort arm length and 3 inches for the load arm length then we obtain the mechanical advantage as

$MA=\frac {15}{3}=5$

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3 years ago

A piece of taffy slams into and sticks to another identical piece of taffy that is at rest. The momentum of the two pieces stuck

Yanka [14]

Answer:0.5

Explanation:

Given

Piece of taffy slams in to sticks to another identical piece and stuck into it.

Let m be the mass of taffy and u be the initial velocity of taffy and v be the final velocity of system.

Conserving momentum

$mu=2mv$

$v=\frac{u}{2}$

Initial kinetic energy $=\frac{mu^2}{2}$

Final Kinetic Energy $=\frac{2m(\frac{u}{2})^2}{2}=\frac{mu^2}{4}$

change in kinetic energy $\Delta K.E.=\frac{mu^2}{2}-\frac{mu^2}{4}=\frac{mu^2}{4}$

change in kinetic energy will contribute in heat energy

thus fraction of kinetic energy converted in to heat $=\frac{heat\ energy}{Initial\ kinetic\ Energy} =\frac{\frac{mu^2}{4}}{\frac{mu^2}{2}}=\frac{1}{2}=0.5$

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4 years ago

Gravitational potential energy depends on the ____________ of the object.

arlik [135]

Answer:

Height And Mass!

Explanation:

Got It from Google! I ain't smart XDD

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