Answer Happy

(7%) Problem 2: A student foolishly attempts to stop a steel bar, of length L= 1 m and at a temperature of 20°C, from thermally expanding by attaching it to a wooden support with a nail at each end. Steel's Young's modulus is Y=16x 10¹1 N/m² and it's linear thermal expansion coefficient is a = 11.1 x 106 1/C. Randomized Variables Y= 16 x 10¹1 N/m² am 11.1 x 106 1/C
S= 25% Part (a) Enter an expression, in terms of defined variables, for the stress, S, that each nail will need to sustain at a temperature T Grade Summary Deductions Potential a d i m To Submit B 8 j P T₁ Thin 0 h k t Y Hints: 2 for a 0% deduction. Hints remailing Use the definition of Young's modulus in terms of stress and strain and solve for stress Use the expression for the relative linear expansion in terms of the coefficient of linear expansion and the initial and final temperatures. ( 7 8 9 12 4 5 6 4 1 2 3 0 + NOACKAGE . HOME CLEAR Teadback I give up! Feedback: 0% deduction per feedback. & 25% Part (b) What is the value of the stress, in pascals, that develops due to a rise of temperature to 21°C? & 25% Part (c) Assuming the nails have a cross-sectional area of A= 10 m² all of which is perpendicular to the stress force from the bar, what is the force acting on each due to that temperature rise? & 25% Part (d) Do you think it is possible to prevent the bar from expanding using nails? ( 100 Submissions Attempts remaining: 998 (0% per attempt) detailed view 1 Os