19. A child on a sled (m = 47.0 kg) slides down a long hill starting from a rest position at a point 10.0 m higher in elevation than his finishing point. a) What is the total mechanical energy present? b) Assuming that there is no friction and no external pushes, determine the child's speed at the bottom of the hill. c) The child's speed at the bottom of the hill is actually 5.0 m/s. Explain whether or not this defies the law of conservation of energy.
instraction how to answer it please follow instraction please i also add example underneth
instrion
Solving problems in Physics, we must always use GUESS method.
Guess stands for:
Guess: G Here you write down what is given in the question
Unknown: U Here you list what you have to calculate, to solve for.
Equations: E here you list all the formulas you need to use to solve the problem
Substitution: S This first letter S in the word, you will just substitute what is given in the
formula. You do not calculate anything. The calculations will occur at the second S: Solve. What
is very important here is to carry with you the units of measure in the formula. Not only the
numbers. This is very important, once again.
Solve: S The last step, second S, you will solve what you plugged in the first S for Substitution.
Very important here is to manipulate the units of measure such that the final units of measure
to be proved by your work. This part is very important, since you will allow you to verify that
what you do is correct. For example, you calculate for acceleration, we know that the units of
measure are
m
s
2
But what I want is to show me how you determined m
s
2
using the formula, and
manipulating what you wrote in the fraction in order to obtain/calculate/determine the units of
acceleration m
s
2
I will show you an example to clarify this
The last to letter S, can repeat again i8f you have to calculate for more stuff, or you determine
one value that can be used in another formula. Like solving step by step.
Step by step
Solved in 4 steps
