We know that the formula to of acceleration is given by,
Re-arrange to the Velocity,
(1)
We know as well for second Newton's law is,
We can re-arrange for the acceleration, so
(2)
Replacing (2) to (1),
Our values are,
Substituting the values,
We have two components of a net velocity, so we can calculate the direct force through,
Answer:
upper part of any wave.
Explanation:
we normally define wave motion in term of movement of particles. compressions and rarefaction. rarefaction particles apart , and same as trough ( part of wave above mean line ).
-- If velocity is constant, then there is no net force
on the chair.
-- If there is no net force on the chair, then friction
must exactly balance out your push.
-- The force of friction is exactly equal in magnitude
to your push, and in exactly the opposite direction.
Yes, Weightlifters are truly working out.
Explanation:
- Definition of work in physics is the transfer of energy when an object is being moved. But, when an object is being lifted then net work done is zero because of the gravitational force acting on it.
- But, if we speak in terms of transferring energy then there is a workout. For example, if you push a bench and it moves. there is a transfer of energy to the bench and it moves.
- Here, when you lift a weight, it burns your calories and also there is a movement for the weight also.
Weight is equal to mass times gravitational acceleration
Therefore w=mxg
Weight is equal to mass times gravity
W=mass x 9.8