(2nd variant, 7kg is 3 times faster than 21kg)
Since the spacecraft is two earth radii the surface of the earth, it is three earth radii above the center.
Given: Radius of the earth re = 6.38 x 10⁶ m r = 1.91 x 10⁷ m
Mass of the spacecraft Ms = 1600 Kg
Mass of the earth Me = 5.98 x 10²⁴ Kg
G = 6.67 X 10⁻¹¹ N.m²/Kg²
Formula: F = GMeMs/r²
F = (6.67 X 10⁻¹¹ N.m²/Kg²)(5.98 x 10²⁴ Kg)(1,600 Kg)/(1.91 x 10⁷ m)²
F = 6.38 X 10¹⁷ N/3.65 X 10¹⁴ m²
F = 1,748.5 N
Answer:
C
<span>
An
axe is a mechanical device with two inclined planes, thick at one end and
tapers to a thin edge and when it is used to chop wood, the axe blade acts as a
wedge and changes the direction of the input force. When the axe blade
penetrates the wood, a portion of the downward force of the blade is changed to
sideways forces, which are perpendicular to each external of the blade and the sideways forces
cause the wood to split in contrasting directions.</span>
Explanation:
Hey there!!
Here,
Initial velocity (u) = 6m/s.
Acceleration (a) = 1.7m/s^2.
Time (t) = 4.2s.
final velocity (v) = ?
We have,
Putting their values,
7.14 = v - 6
v = 7.14 + 6
Therefore, the final velocity is 13.14 m/s.
<em><u>Hope</u></em><em><u> </u></em><em><u>it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>
