When a liquid changes to gas, this phase change is called vaporization or evaporization.
<u>F = M A </u> (Newton's #2)
Force = (0.15 kg) (12 m/s²)
Force = (0.15 · 12) (kg·m/s²)
<em>Force = 1.8 Newtons</em>
Answer:
Acceleration of the boy a₁:
Explanation:
Conceptual analysis
We apply Newton's second law to the boy and the girl:
F = m*a (Formula 1)
F : Force in Newtons (N)
m : mass in kilograms (kg)
a : acceleration in meters over second square (m/s²)
Nomenclature
m₁ : boy mass
m₂ : girl mass
a₁ : boy acceleration
a₂ : girl acceleration
F₁ : boy acceleration
F₂ : girl acceleration
Known data
m₁ = 57 kg
m₂ = 41 kg
a₂ = 2.6 m/s²
Problem development
We apply to Newton's third law of action and reaction, then:
F₁ = F₂ , We apply the formula (1):
m₁*a₁ = m₂*a₂
When the life preserver is dropped from the helicopter, the only force acting on the object is the gravitational force. This modifies the equations of motion. Thus, the working equation is written below:
h = vt + 0.5gt²
where
v is the initial velocity
g is the acceleration due to gravity equal to 9.81 m/s²
h is the height of the fall
h = (1.46 m/s)(1.8 s) + 0.5(9.81 m/s²)(1.8 s)
h = 11.457 m
The correct option is d
<span>Weight changes depending on distance from the earth, mass does not.
Weight can be defined as the force exerted on an object due to the effects of gravity.
As we move far away from the Earth, the effects of gravity lessen and thus the weight decreases. (But the mass remains constant, because it only depends on the volume and density of the object)
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