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tigry1 [53]
3 years ago
6

While a roofer is working on a roof that slants at 36.0 ° above the horizontal, he accidentally nudges his 86 0 N toolbox, caus

ing it to start sliding downward, starting from rest If it starts 4.00 m from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 22.0 N?
Physics
1 answer:
Nataliya [291]3 years ago
7 0

Answer:

Explanation:

mass of the toolbox = 86 / 9.8

= 8.775 kg

Net force acting on the toolbox down the roof

= mgsin36 - kinetic friction

= 86 x .5877 - 22

= 28.54 N

acceleration of box = 28.54 / 8.775

a = 3.25 m /s²

v² = u² + 2 a s

u = 0 , a = 3.25 , s = 4 m

v² = 2 x 3.25 x 4

v = 5.1 m / s

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A 27 kg bear slides, from rest, 14 m down a lodgepole pine tree, moving with a speed of 6.1 m/s just before hitting the ground.
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4 years ago
Write short notes on:<br>human made wetland​
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In India's Punjab state, in the Kapurthala district, lies the man-made Kanji Wetland, which includes the Kanji Lake.

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