5. In a lab experiment, 45 grams of a metal are heated from 22⁰C to 78⁰C by the addition of 450 J of heat. What is the specific
1 answer:
You might be interested in
The crate moves at constant velocity, this means that its acceleration is zero, so the net force acting on the crate is zero (Newton's second law).
There are only two forces acting on the crate: the force F applied by the worker and the frictional force, acting in the opposite direction:
, where 
is the coefficient of friction and 
is the mass of the crate. Since the net force should be equal to zero, the two forces must have same magnitude, so we have:
And so, this is the force that the worker must apply to the crate.
There are only two forces acting on the crate: the force F applied by the worker and the frictional force, acting in the opposite direction:
And so, this is the force that the worker must apply to the crate.
Differentiate the components of position to get the corresponding components of velocity :
At <em>t</em> = 5.0 s, the particle has velocity
The speed at this time is the magnitude of the velocity :
The direction of motion at this time is the angle that the velocity vector makes with the positive <em>x</em>-axis, such that
The power in every scenario is the same. Power is the measurement of the energy transfer over time.
<h3>What is power?</h3>Power is the measurement of the energy transfer over time. It can be calculated by the formula,
Where,
- power
- work
- time
In scenario A,
In scenario B,
In scenario B,
Therefore, the power in every scenario is the same.
Learn more about Power: