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bija089 [108]
3 years ago
13

A block of mass 11.0 kg slides from rest down a frictionless 38.0° incline and is stopped by a strong spring with

Physics
1 answer:
ivanzaharov [21]3 years ago
8 0

Answer:

11.72 mm

Explanation:

The gravitational potential energy equals the potential energy of the spring hence

PE_{gravitational}=PE_{spring}

mgh=0.5kx^{2} where m is the mass of object, g is the acceleration due to gravity, h is the height, k is the spring constant and x is the extension of the spring

mgdsin\theta=0.5kx^{2} where \theta is the angle of inclination and d is the sliding distance

Making x the subject then

x=\sqrt {\frac {2mgdsin\theta}{k}}

Substituting the given values then

x=\sqrt{\frac {2\times 11\times 9.81\times 3\times sin 38}{2.9\times 10^{4}}}= 0.117240716\approx 11.72 mm

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