Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

OO... Routing xTool 40W Upgrade... Oregon Sports Wat.. 10 8cm Genuine BE... Kelio Figure 2 shows a decorator's plank, which is 5 m in length,

image text in transcribedimage text in transcribed
image text in transcribedimage text in transcribed
OO... Routing xTool 40W Upgrade... Oregon Sports Wat.. 10 8cm Genuine BE... Kelio Figure 2 shows a decorator's plank, which is 5 m in length, uniform, and supported on two trestles. The mass of the plank is 48 kg and the mass of the decorator is 68 kg. In order to paint a stairwell, the decorator has to position themselves at point A, as shown on Figure 2. To stop the plank tipping, the decorator's assistant pulls down a rope attached at point B. 1.5 m 2 m 1 m Figure 2 The decorator's plank (not drawn to scale) Show description v age a. Draw a free body diagram showing all the forces acting on the plank and the he Open University distances from point C (the left-hand support) at which each force acts. (4 marks) b. State, in words, two conditions that must be satisfied for the plank to be stationary and stable. (2 marks) c. For each of the two conditions you have identified in Part (b), using the information contained in your diagram, write an equation that must be satisfied for the plank to remain stationary. Do not include units in your equations (4 marks) W Q Search A L hpd. What is the minimum force that the assistant must apply to the rope to prevent the plank from tipping? (Hint, think about the reaction forces at the trestle nearest the rope.) Give your answers to 2 significant figures. (6 marks) e. The assistant gets tired and instead of pulling the rope attaches a mass of 27 kg to it. Calculate the stress in the rope knowing that its diameter is 24 mm. Give your answer to 2 significant figures. (4 marks) Take the acceleration due to gravity, g, to be 9.8 m s-2. Question 3 Question 5 View page Saved for Send tour later feedback do Q Search KILDO W

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image_2

Step: 3

blur-text-image_3

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Modern Physics for Scientists and Engineers

Authors: John C. Morrison

1st edition

123751126, 123751128, 978-0123751126

More Books

Students also viewed these Physics questions