What is -0.000000698 in scientific notation

Physics

1 answer:

dangina [55]3 years ago

6 0

-6.98 × 10-^7 is the answer <3

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In certain cases, using both the momentum principle and energy principle to analyze a system is useful, as they each can reveal

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Explanation:

The gravitational force equation is the following:

$F_G = G * \frac{m_1 m_2}{r^2} \\$

Where:

G = Gravitational constant = $6.67408 * 10^{-11} m^3 kg^{-1} s^{-2}$

m1 & m2 = the mass of two related objects

r = distance between the two related objects

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3 years ago

Which describes an object in projectile motion? Check all that apply.

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Answer:

Gravity acts to pull the object down.

The object’s inertia carries it forward.

The path of the object is curved.

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The motion of a projectile consists of two separate motions:

- A uniform motion along the horizontal direction, where the velocity is constant; since there are no forces along this direction, the velocity does not change, and so the object continues its motion for inertia --> so, the statement "The object’s inertia carries it forward" is true.

- A uniformly accelerated motion along the vertical direction, with a constant downward acceleration (g=9.8 m/s^2, acceleration due to gravity). So, the vertical velocity changes, due to the presence of the gravity that acts to pull the object down.

- As a result of the combination of these two motions, the object follows a curved path (in particular, it is a parabolic path).

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You hold a metal block of mass 40 kg above your head at a height of 2 m.

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Answer:

The work done by gravity is 784 J.

Explanation:

Given:

Mass of the block is, $m=40\ kg$