What kind of energy is used in baking?A. LightB. SoundC. HeatD. Mechanical
1 answer:
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a) The acceleration of the objects is
b) The tension in the string is 280.8 N
Explanation:
a)
We start by writing the equations of motion for the two masses attached to the pulley.
For the heavier mass, we have:
(1)
where
is the mass
is the acceleration of gravity
T is the tension in the string
a is the acceleration of the system (here we assumed that the heavier mass accelerates downward)
For the lighter mass, we have
(2)
where
T is the tension in the string
is the mass
is the acceleration of gravity
a is the acceleration of the system (here we assumed that the lighter mass accelerates upward)
From (1) we get
And substituting into (2),
b)
From the previous part of the problem we got an expression for the tension in the string:
Where we have
is the acceleration, found in part a)
Susbtituting, we find
Learn more about forces and acceleration:
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Answer:
First let's look at the gravitational formula by newton:
Now the f and g should be capital but that's not possible with the equation system. But we can see that the force the astronaut is pulled at is dependent on the mass and the distance if we assume his mass stays the same (mass and weight aren't the same also g is a constant). If a planet has twice the radius the force will by four times as weak because of the ^2. This is not compensated by the twice as big mass. Therefore the astronaut will have a higher force and thus a higher weight on planet B