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lidiya [134]
3 years ago
14

A 3 kg mass object is pushed 0.6 m into a spring with spring constant 210 N/m on a frictionless horizontal surface. Upon release

, the object moves across the surface until it encounters a rough incline. The object moves UP the incline and stops a height of 1.5 m above the horizontal surface.
(a) How much work must be done to compress the spring initially?
(b) Compute the speed of the mass at the base of the incline.
(c) How much work was done by friction on the incline?
Physics
1 answer:
Svetradugi [14.3K]3 years ago
8 0

Answer with Explanation:

We are given that

Mass of spring,m=3 kg

Distance moved by object,d=0.6 m

Spring constant,k=210N/m

Height,h=1.5 m

a.Work done  to compress the spring initially=\frac{1}{2}kx^2=\frac{1}{2}(210)(0.6)^2=37.8J

b.

By conservation law of energy

Initial energy of spring=Kinetic energy  of object

37.8=\frac{1}{2}(3)v^2

v^2=\frac{37.8\times 2}{3}

v=\sqrt{\frac{37.8\times 2}{3}}

v=5.02 m/s

c.Work done by friction on the incline,w_{friction}=P.E-spring \;energy

W_{friction}=3\times 9.8\times 1.5-37.8=6.3 J

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a car accelerates from rest at 3 m / s^2 along a straight road. how far has the car travelled after 4 s
evablogger [386]

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24 m

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s=ut+\frac{1}{2}at^2

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s is the distance covered

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t is the time elapsed

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For the car in this problem:

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4 0
3 years ago
5. One of the attractions at Typhoon Lagoon, a water park in Florida, is a surf
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1595790 gallons

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Answer:

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Given data

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increase in temperature of water

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heat = m × specific heat × Δt

here m is mass = 50000 gram and Δt is change in temperature

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Answer:

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Hence, the survivor will it hit the waves at 547 m away

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