Answer:
Aerobic exercise reduces the risk of many conditions, including obesity, heart disease, high blood pressure, type 2 diabetes, metabolic syndrome, stroke and certain types of cancer. Weight-bearing aerobic exercises, such as walking, help decrease the risk of osteoporosis.
Answer:
A. ) F₁ₓ = -45.0 N F₁y = 53.6 N
B.) F₂ₓ = 3.48 N F₂y = -19.7 N
C.) Fₓ = -41.5 N Fy = 33.9 N
D) F = 53.6 N
E) θ = -39. 2º (320.8º)
Explanation:
A)
- Applying simple trig, like definitions of cos and sin of an angle, we can get the x- and y- components of F₁, as follows:
B)
C)
- The x- and y- components of the resultant force, are just the algebraic
sum of the x- and - y components of F₁ and F₂:
- Fₓ = Fₓ₁ + Fₓ₂ = -45 N + 3.48 N = -41.5 N (5)
- By the same token, Fy can be written as follows:
- Fy = Fy₁ + Fy₂ = 53.6 N + (-19.7 N) = 33.9 N (6)
D)
- The magnitude of the resultant force can be obtained applying the Pythagorean Theorem to Fx and Fy, as follows:
E)
- Finally the angle regarding the x- axis of the resultant force vector, can be obtained using the definition of the tangent of an angle, as follows:
Answer:
Since there is no external force, there is no change (movement) in the center of mass. Internally, the center of mass might change position, but the external result is still zero net velocity.
The net recoil velocity must be zero.
<span>-The first law, also known as Law of Conservation of Energy, states that energy cannot be created or destroyed in an isolated system.
-</span><span>The second law of thermodynamics states that the entropy of any isolated system always increases.
-</span><span>The third law of thermodynamics states that the entropy of a system approaches a constant value as the temperature approaches absolute zero.</span>
D is the answer. Bc the pointy