Answer:
a) Magnitude of the average velocity from t = 0 to t = 2 s = 2.24 m/s
b) Magnitude of the average velocity from t = 0 to t = 5 s = 3.16 m/s
Explanation:
a) Velocity is rate of change of position.
A particle's position coordinates (x, y) are (1.0 m, 3.0 m) at t = 0
A particle's position coordinates (x, y) are (5.0 m, 5.0 m) at t = 2.0 s
Displacement = (5-1)i + (5-3)j = 4i + 2j
Change in time = 2s
Velocity
![v=\frac{4i+2j}{2}=2i+j](https://tex.z-dn.net/?f=v%3D%5Cfrac%7B4i%2B2j%7D%7B2%7D%3D2i%2Bj)
Magnitude of velocity
![v=\sqrt{2^2+1^2}=2.24m/s](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B2%5E2%2B1%5E2%7D%3D2.24m%2Fs)
b) Velocity is rate of change of position.
A particle's position coordinates (x, y) are (1.0 m, 3.0 m) at t = 0
A particle's position coordinates (x, y) are (14.0 m, 12.0 m) at t = 5.0 s
Displacement = (14-1)i + (12-3)j = 13i + 9j
Change in time = 5s
Velocity
![v=\frac{13i+9j}{5}=2.6i+1.8j](https://tex.z-dn.net/?f=v%3D%5Cfrac%7B13i%2B9j%7D%7B5%7D%3D2.6i%2B1.8j)
Magnitude of velocity
![v=\sqrt{2.6^2+1.8^2}=3.16m/s](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B2.6%5E2%2B1.8%5E2%7D%3D3.16m%2Fs)
Answer:
william h. seward secured the purchase of alaska from:
Explanation:
Answer:
Halos, blurriness, and night blindness causes night vision (symptoms) while vitamin-A,corrective lenses, such as eyeglasses or contacts, can improve or help night vision.
Explanation:
I bet you will get full Marks if you write it!!
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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.