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3 years ago

A force of 50N is applied to the end of a lever to lift a rock that is 350N . what is the mechanical advantage of a lever?

Physics

1 answer:

Ostrovityanka [42]3 years ago

5 0

Answer:

MA = 7

Explanation:

Mechanical Advantage = Load/Effort

From the question,

Load = 350N

Effort applied = 50N

Mechanical Advantage = 350N/50N

Mechanical Advantage = 7

Hence the mechanical advantage is 7

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Answer:

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Explanation:

It is given that,

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Final momentum of the ball, $p_f=mv=1\ kg\times (12\ m/s)=12\ kg-m/s$

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3 years ago

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Potential energy is defined by formula

$U = mgh$

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Answer:

1. Hydrogen

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3 years ago

Read 2 more answers

A parallel-plate capacitor stores charge Q. The capacitor is then disconnected from its voltage source, and the space between th

Stells [14]

Answer:

The relationship between the initial stored energy $PE_{i}$ and the stored energy after the dielectric is inserted $PE_{f}$ is:

c) $PE_{f} =0.5\ PE_{i}$

Explanation:

A parallel plate capacitor with $C_{o}$ that is connected to a voltage source $V_{o}$ holds a charge of $Q_{o} =C_{o} V_{o}$ . Then we disconnect the voltage source and keep the charge $Q_{o}$ constant . If we insert a dielectric of $\kappa=2$ between the plates while we keep the charge constant, we found that the potential decreases as: