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____ [38]
3 years ago
14

Can uh help in in this question step by step​

Physics
2 answers:
Luda [366]3 years ago
7 0
  • Initial velocity=u=72km/h

Convert to m/s

\\ \sf \longmapsto 72\times \dfrac{5}{18}=5(4)=20m/s

  • Final velocity=v=0m/s
  • Time=2s=t

\\ \sf \longmapsto Acceleration=\dfrac{v-u}{t}

\\ \sf \longmapsto Acceleration=\dfrac{0-20}{2}

\\ \sf \longmapsto Acceleration=\dfrac{-20}{2}

\\ \sf \longmapsto Acceleration=a=-10m/s^2

  • Distance be s

Using second equation of kinematics

\\ \sf \longmapsto s=ut+\dfrac{1}{2}at^2

\\ \sf \longmapsto s=20(2)+\dfrac{1}{2}(-10)(2)^2

\\ \sf \longmapsto s=40+(-20)

\\ \sf \longmapsto s=40-20

\\ \sf \longmapsto s=20m

Now

  • Mass=m=5000kg

Using newtons second law

\\ \sf \longmapsto Force=ma

\\ \sf \longmapsto Force=5000(-10)

\\ \sf \longmapsto Force=-50000N

  • Force is in opposite direction so its negative

\\ \sf \longmapsto Force=50kN

vlabodo [156]3 years ago
6 0

Answer . The acceleration of the truck is 10m/s^{2}, and the distance covered is 40 m. Have attached the picture for solution.

Hope that helps.

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A hole is punched at A in a plastic sheet by applying a 660-N force P to end D of lever CD, which is rigidly attached to the sol
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Answer:

hello your question lacks some data and required diagram

G = 77 GPa,  т all = 80 MPa

answer : required diameter = 252.65 * 10-^3 m

Explanation:

Given data :

force ( P )  = 660 -N force

displacement = 15 mm

G = 77 GPa

т all = 80 MPa

i) Determine the required diameter of shaft BC

considering the vertical displacement ( looking at handle DC from free body diagram )

D' = 0.3 sin∅  ,   where D = 0.015

hence ∅ = 2.8659°

calculate the torque acting at angle ∅  of  CD on the shaft BC

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hello attached is the remaining part of the solution

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