I don't understand how to solve this. Pls helpKlaas van Aarsen said:We can apply conservation of energy.
What is the energy due to gravity at the beginning?
What is the kinetic energy at the end?
h=0.2m, so v= 2m/s. I was getting confused with the length of the ramp.Klaas van Aarsen said:You have the correct equation.
Fill in g and h.
And we can cancel m from both sides.
The work-energy principle states that the work done on an object is equal to the change in its kinetic energy. This means that when a force acts on an object, it either speeds up or slows down, and the work done by the force is equal to the change in the object's kinetic energy.
Work is calculated by multiplying the force applied to an object by the distance the object moves in the direction of the force. The formula for work is W = Fd, where W is work, F is force, and d is distance.
Work and energy are closely related, as work is the transfer of energy from one object to another. Work is also a measure of the change in an object's energy. When work is done on an object, its energy changes, and when work is done by an object, it loses energy.
Power is the rate at which work is done or energy is transferred. It is calculated by dividing the amount of work done by the time it takes to do the work. The unit of power is watts (W), which is equal to one joule per second (J/s).
The work-energy principle and power have many real-world applications, such as calculating the power output of a car engine, determining the work done by a weightlifter, and understanding the energy transfer in a roller coaster. They are also important in fields such as engineering, physics, and sports science.