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2 years ago

6

the force exerted by gravity,electricity,and magnetism act at a distance with no physical connection. for this reason, they are

called___forces

2 answers:

Soloha48 [4]2 years ago

7 0

Its called the electric force

Trava [24]2 years ago

3 0

Electric is the answer

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A rock is thrown upward from the level ground in such a way that the maximum height of its flight is equal to its horizontal ran

marshall27 [118]

Answer

a) For the rock

$\dfrac{v_t^2sin 2\theta}{g} = \dfrac{v_t^2sin^2\theta}{2g}$

$2sin\thetacos\theta = \dfrac{sin^2\theta}{2}$

$2cos\theta = \dfrac{sin\theta}{2}$

$tan\theta = 4$

$\theta = tan^{-1} 4$

$\theta = 76^0$

b) $\theta = 45^0$ for maximum range

$\dfrac{d_{max}}{d}=\dfrac{(v_tcos 45^0)(2v_tsin 45^0)g}{(v_tcos 76^0)(2v_tsin 76^0)g}$

$\dfrac{d_{max}}{d}=\dfrac{0.707\times 0.707)}{0.97\times 0.242}$

$\dfrac{d_{max}}{d}=2.129$

$d_{max}=2.129 d$

c) The value of θ is the same on every planet as g divides out.

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Is water wet my friends have been arguing about this for about 3 months now but now it is time to hear other people

nirvana33 [79]

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How would I workout question 4?? Please help

Agata [3.3K]

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Explanation:

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As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less.

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