e-\'ON CAPA Mastery f m Facebook x \\ G A 3.90 kg particle is x \\ D Work as the

Question

e-'ON CAPA Mastery f m Facebook x G A 3.90 kg particle is x D Work as the AreoU × Chee10 Energy Wo https; Question 3: Correct x × xTwitter c secure loncapa science uoit.ca/res uoit joe/Physics%20l/10%20 %20Work/Mastery 10 work.problem#L2 Attempts remaining: g Question 1 F (N) x (m) A 4.15 kg particle is moving 2.10 ms atx-0 m. It experiences the force shown in the figure above. what is the particle'svelocity atx-3 m? 5.63 m/5 2.53 m/5 3.90 m/s 1.27 m/s Question 2 A 30.6 kg child ridesa 6.30 kg toborgan down a 12.2 m high snowy hil. If the childl starts from rest and has a speed of 7.85 mis at the bottom of the hill, what is the chanein thermal energw o lyie here lo search

Explanation / Answer

area under the F vs x curve will give work done.

from 0 to 3 m.

W = 15 x 3 / 2 = 22.5 J

And work done = change in KE

22.5 = 4.16(v^2 - 2.10^2) / 2

v = 3.90 m/s ..........Ans

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