Explanation:
a) Sum of moments about the pivot:
∑τ = Iα
(10 kg × 10 m/s²) (0.3 m) + F (-0.4 m) = 0
F = 75 N
b) Sum of moments about the pivot:
∑τ = Iα
(20 N) (0.3 m) + (20 N) (-0.2 m) + F (-0.7 m) = 0
6 Nm − 4 Nm + F (-0.7 m) = 0
F = 2.9 N
Answer: 4.64 × 10^7 mg
Explanation:
Given:
T =1299g + 45.1kg
Convert kg to g
T = 1299g + 45.1kg ×1000g/kg
T = 1299g + 45100g
T = 46399g
T= 4.64 × 10^4 g
Convert to milligram
T = 4.64 × 10^4 g × 1000mg/g
T = 4.64 × 10^7 mg
Therefore, 1299g + 45.1kg = 4.64 × 10^7 mg
Answer:
a property of a moving body that the body has by virtue of its mass and motion and that is equal to the product of the body's mass and velocity
Explanation:
Formula:
Momentum: Mass x Velocity
Hope it helps!
When you are talking about the Principle of mechanical Energy Conservation, it is really only including the kinetic and potential energy in a total system. When frictional forces are present, although the conservation of energy law is still present, it does not work when it comes to the conservation of mechanical energy as there is another type of energy that is factored in. As friction acts on the object, that transition from potential to kinetic as it slide/falls will be completely different as some of that energy is being transformed into thermal energy. Which breaks the conservation of mechanical energy.
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