Answer: 1327 kg
Explanation:
First of all, we can notice that the forces along the vertical direction (gravity and normal force) are equal and opposite, so they cancel each other and we can ignore them.
The relationship between the net force on the horizontal direction and the acceleration of the wagon is given by Newton's second law:
where
is the net force on the wagon
m is the mass of the wagon
a is the acceleration
In this problem, the net force on the wagon is:
the mass is unkown
and the acceleration is
So we can re-arrange the equation above to find the mass of the wagon:
As show the figure, peak of each blackbody curves shifts towards higher frequency. Then energy emitted by the black body is directly proportional to the frequency incident radiation.
Hence peak is shifted to higher energies.
Therefore the correct option is B: Toward higher energies.
So here in order to find the average velocity we can say
so first we know that along the horizontal and along the inclined it moves with same time interval
so here we will have displacement in x direction as
now the average velocity in x direction will be given as
now similarly for y direction
first we will find its displacement
now the average velocity in y direction will be given as
now net velocity is given as
Answer:
<u>Work done by the force acting on a body is defined as the product of force and displacement of the body in the direction of the force.</u><u> </u> It is a scalar quantity. Force acting on the body must produce a displacement for the work is to be done by the force. Thus, for the work to be done, the following conditions must be fulfilled:
A force must be applied and the applied force must produce a displacement in any direction except perpendicular to the direction of the force.
Mathematically,
( in the direction of force)
i.e W= F•D
The SI unit of force is Newton (N) and that of displacement of a metre (M). So the unit of work is Newton metre(Nm) which is joule (J).
Thus, one joule work is said to be done when one Newton force displaces a body through one metre in its own direction.
Hope this helps...
Good luck on your assignment..
