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Serhud [2]
4 years ago
10

Work done of frictional force from instant ​

Physics
1 answer:
Liono4ka [1.6K]4 years ago
4 0

Answer:

  • -100\ J

Step-by-step explanation:

<u>1. Find acceleration:</u>

  • m=2\ kg
  • F=-5\ N
  • a=\frac{F}{m}  (Newton's second law)
  • a=\frac{-5}{2} =-2.5\ \frac{m}{s^{2}}

<u>2. Find distance traveled:</u>

  • v_0=10\ \frac{m}{s}
  • v=0
  • a=-2.5\ \frac{m}{s^{2} }
  • v^2-v_0^2=2ad (Kinematic equation)
  • -100=-5d
  • d=20\ m

3. Find work done by friction:

  • W=Fd (Work formula when angle between Force and Displacement vectors are 0°)
  • W=-5\times20=-100\ J
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