jack wants to weigh at most 176 pounds before the baseball season begins. he has already lost 15 pounds. he belives he can lose
1 answer:
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Answer:
Pierre operates at a greater power level than Marie.
Marie and Pierre do the same amount of work
Step-by-step explanation:
Mass of crate=60kg
Height of truck bed=1 m
Time=3s
Pierre's work done=
Using formula Work done=mgh
Where m=mass of object
g=Acceleration due to gravity=9.8
Power=
Using the formula
Pierre's power=
Mass of box=2.5Kg
Total number of boxes=24
Total mass of boxes=
Time=2 min=
1 min=60 s
Marie;s work done=
Marie's power=
Pierre operates at a greater power level than Marie.
Marie and Pierre do the same amount of work
To solve this we can take two different approaches:
1. We can substitute theta by 30° and evaluate our expression using a calculator:
2. We can use the unitary circle and the fact that
, so we can rewrite our expression as follows:
From our unitary circle we can check that
and 
.
Lets replace those values in our expression and simplify:
Either way we can conclude that the correct answer is: D)8.7
1. We can substitute theta by 30° and evaluate our expression using a calculator:
2. We can use the unitary circle and the fact that
From our unitary circle we can check that
Lets replace those values in our expression and simplify:
Either way we can conclude that the correct answer is: D)8.7