The weight lifter used a force of 980 N to raise the barbell over her head in 5.21 seconds. Approximately how much work did she
1 answer:
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Use the formula below for this question:
re-arrange to solve for a:
now simply plug in your variables and there's your answer :). If you ever get stuck, you can look up the kinematic equations!
re-arrange to solve for a:
now simply plug in your variables and there's your answer :). If you ever get stuck, you can look up the kinematic equations!
Answer:
The work done by gravity during the roll is 490.6 J
Explanation:
The work (W) is:
<em>Where</em>:
F: is the force
d: is the displacement = 20 m
The force is equal to the weight (W) in the x component:
<em>Where:</em>
m: is the mass of the bowling ball = 5 kg
g: is the gravity = 9.81 m/s²
θ: is the degree angle to the horizontal = 30°
Now, we can find the work:
Therefore, the work done by gravity during the roll is 490.6 J.
I hope it helps you!