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djyliett [7]
3 years ago
13

1. A snowboarder of mass 60 kg is at rest on the top of a sand dune. The coefficients of static and kinetic friction are 0.55 an

d 0.4675, respectively. 60 kg μk = 0.4675 μs = 0.55 What is the angle the incline must exceed so that the snowboarder starts sliding? The acceleration of gravity is 9.8 m/s2 . Answer in units of ◦. 2. What is the acceleration down the incline if = 35 ◦, exceeding the value found in the previous question? Please help. I am so confused.
Physics
2 answers:
diamong [38]3 years ago
7 0

Answer:

Inclined angle must exceed 26.57°

Acceleration = 1.17m/s^2

Explanation:

Mg= 60× 9.8=588N

Fp= force on inclined plain

Fp=588sinA

Fn=588cosA= normal force

Fs= us×Fn= 0.55(588cosA)= 323.4cosA

Fp-Fs=ma

588sinA - 323.4cosA=60×0

588sinA=323.4cosA

Dividing by 588

SinA=0.5cosA

But sinA/cosA = Tan

Tan A=0.5

Tan^-0.5 = 26.57°

Weight(x) - Fn= ma

Sin35mg - ucos 35mg = ma

Dividing through by m gives

Sin35g- ucosg= a

0.5736×9.8)- (0.55×0.8192×9.8) =a

5.62- 4.42=a = 1.17m/s^2

Zigmanuir [339]3 years ago
6 0
Im stuck to i need help
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Answer:

Explanation:

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7 0
2 years ago
A parallel-plate capacitor is made from two aluminum-foil sheets, each 3.0 cm wide and 5.00 m long. Between the sheets is a mica
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This question is incomplete, the complete question is;

A parallel-plate capacitor is made from two aluminum-foil sheets, each 3.0 cm wide and 5.00 m long. Between the sheets is a mica strip of the same width and length that is 0.0225 mm thick. What is the maximum charge?

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Explanation:

Given data;

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q/v = KA∈₀ / d

q =  vKA∈₀/d = EKA∈₀

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Answer:

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