3 years ago

Please help quick please

Physics

1 answer:

Ede4ka [16]3 years ago

3 0

I can’t see the picture what do you need help with

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Choice-A is the correct one. It doesn't say it, but it means he'll see the ball reach the catcher's mitt first BEFORE HE HEARS IT slap the mitt.

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A 706-N man stands in the middle of a frozen pond of radius 8.0 m. He is unable to get to the other side because of a lack of fr

mariarad [96]

Answer:

t=62 s

Explanation:

Applying the conservation of linear momentum formula:

$(m1+m2)*v_{o1}=m1*v_{f1}+m2*v_{f2}$

the initial velocity is zero, we can calculate the man's mass using the gravitational force formula:

$F_g=m.g\\\\m=\frac{706N}{9.81}\\\\m=72.0kg$

now:

$m*v_{f1}=-m_b*v_b\\\\V_{f1}=-\frac{m_b*v_b}{m}\\\\V_{f1}=-\frac{1.2kg*8.0m/s}{72.0kg}\\\\V_f=-0.13m/s$

That is 0.13m/s due south.

because there is no friction, the man will maintain a constant velocity, so:

$d=v*t\\t=\frac{d}{v}\\t=\frac{8m}{0.13m/s}\\\\t=62s$

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3 years ago

A block on a rough, horizontal surface is attached to a horizontal spring of negligible mass. The other end of the spring is att

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Answer:

Explanation:

It has the least potential energy in the spring because the spring expanded all the way meaning it is going the fastest

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It took 150 joules to lift a rock 1.5 meters into the air. How much force did it take to left the rock?

Semmy [17]

Hi there!

We can use the equation:

$\large\boxed{{W = F \cdot d}}$

W = Work (J)

F = Force (N)

d = displacement (m)

We can rearrange to solve for force:

$\large\boxed{F = \frac{W}{d}}$

Plug in the givens:

$F = \frac{150}{1.5} = \boxed{100N}$

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Answer:

35325235325325

Explanation:

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