3 years ago

10. John does 176 J of work lifting himself a distance of 0.40 m. How

Physics

1 answer:

ch4aika [34]3 years ago

4 0

The answer is 440N

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Which of the following is the correct formula for calculating power

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Power is energy per unit time. Therefore, D is the correct one

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A soccer player is running at a constant speed of 1.8 m/s when she speeds up in the same direction with an acceleration of 0.50

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4 years ago

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A 64.0 kg pole vaulter running at 10.2 m/s vaults over the bar. If the vaulter's horizontal component of velocity over the bar i

Lubov Fominskaja [6]

Answer:

h = 5.05 m

Explanation:

given,

mass of pole vaulter, m = 64 Kg

speed of the vaulter,V = 10.2 m/s

horizontal component of velocity in air, v = 1 m/s

height of the jump,h = ?

using energy conservation

$E_i = E_f$

$\dfrac{1}{2}mv_i^2 + m g h_i= \dfrac{1}{2}mv_f^2+m g h_f$

initial height of the vaulter is equal to zero.

$\dfrac{1}{2}v_i^2 = \dfrac{1}{2}v_f^2+gh_f$

$h =\dfrac{v_i^2-v_f^2}{2g}$

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h = 5.05 m

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4 years ago

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Explanation:

velocity = dx/dt

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$\frac{ {d}^{2}x }{d {t}^{2} } = 6 \ \\$

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3 years ago