Answer:
thermal, hot equals thermal and such
The power of the weightlifter is equal to the ratio between the work done by it and the time taken:
since we know the power and the time, we can find the work done:
For the work-energy theorem, this work done by the lifter is equal to the gravitational potential energy gained by the mass, which is given by:
where m is the mass and
is the increase in height. Rearranging the formula and using W=U, we can find the mass:
Answer:
The answer to your question is Friction
Explanation:
As is mentioned in the question, Betsy held on to the sides of the slide the whole way down, that means that her hands were rubbing the slide and this process causes a force called <u>friction. </u>And Friction is perceived as heat.
The definition of friction is: Friction is the resistance to motion of one object moving relative to another.
In your question her hands create a resistance to motion.
A compound machine is one that consists of a couple simple machines working together, like a wheelbarrow contains the lever, axle, and wheel. While a simple machine would just be those individually, or anything else that can be used for applying a force.<span />
The answer is B
you're welcome