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Kaylis [27]
3 years ago
10

NEED ANSWER ASAP PLEASE!!!!!!!

Physics
1 answer:
Usimov [2.4K]3 years ago
7 0

In both questions, the objects are falling from rest so their final velocities after time t will be given by

v_f=v_i+at=at

where a is the acceleration due to gravity given. Note that I take the downward direction to be positive.

23.

v_f=\left(9.8\,\dfrac{\mathrm m}{\mathrm s^2}\right)(7\,\mathrm s)\implies v_f=68.6\,\dfrac{\mathrm m}{\mathrm s}

24.

49\,\dfrac{\mathrm m}{\mathrm s}=\left(9.8\,\dfrac{\mathrm m}{\mathrm s^2}\right)t\implies t=5.0\,\mathrm s

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3 years ago
Does the mass of a pendulum affects the period of oscillation
pshichka [43]
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Which formula can be used to calculate the horizontal displacement of a horizontally launched projectile?
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3 years ago
With the switch open, roughly what must be the resistance of the resistor on the right for the current out of the battery to be
Delvig [45]

Answer:

The resistance must be 6.67\Omega

Solution:

Resistance, R_{1} = 20\Omega

Resistance, R_{2} = 10\Omega

For the current to be the same when the switch is open or closed, the resistances must be connected in parallel as current is distributed in parallel with the same voltage across the circuit:

Thus in parallel:

\frac{1}{R_{eq}} = \frac{1}{R_{1}} + \frac{1}{R_{2}}

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