Answer:
7400 m/s
Explanation:
Centripetal acceleration = gravity
v² / r = GM / r²
v = √(GM / r)
Given:
G = 6.67×10⁻¹¹ m³/kg/s²
M = 5.98×10²⁴ kg
r = 9.8×10⁵ + 6.357×10⁶ = 7.337×10⁶ m
v = √(6.67×10⁻¹¹ (5.98×10²⁴) / (7.337×10⁶))
v = 7400
The orbital velocity is 7400 m/s.
The approach here is to decompose all directions into North and East and then do simple Cartesian addition of the obtained coordinates.
S1 = 399 E
S2 = 552 Km 58.5 deg west of north ;
= 552 cos (58.5) N - 552 sin (58.5) E
= 288.41 N - 470.65 E
S3 = 890 N
total S = (890 + 288.41) N + (399 - 470.65) E
S = 1178.41 N - 71.65 E
D =
D = 1180.58 Km
direction = atan(N/E) = -86.52 deg
means : 3.48 deg west of north
Answer:
20 meters.
Explanation:
Since it went 100 meters in 10 seconds, that means it is going 10 meters per second. In 2 seconds, it must have gone 20 meters, if the speed is constant.