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How much work would it take to push a # 4 kg # weight up a # 14 m # plane that is at an incline of # pi / 4 #?

Answer 1

#W=E_p=388,48J#

#W:"Work"#
#E_p="Potential energy"#
#m=4kg#
#l=14m#
#alpha=pi/4#
#h=l*sin (pi/4)#
#h=14*0,707#
#h=9,90m#

#E_p=m*g*h#

#E_p=4*9,81*9,9#

#W=E_p=388,48J#

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Answer 2

[ W = m \cdot g \cdot d \cdot \sin(\theta) ]

[ W = 4 , \text{kg} \cdot 9.8 , \text{m/s}^2 \cdot 14 , \text{m} \cdot \sin\left(\frac{\pi}{4}\right) ]

[ W \approx 400 , \text{J} \cdot \sin\left(\frac{\pi}{4}\right) ]

[ W \approx 400 , \text{J} \cdot \frac{\sqrt{2}}{2} ]

[ W \approx 400 , \text{J} \cdot 0.707 ]

[ W \approx 282.8 , \text{J} ]

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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