This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: 220/spring2009 GiambattistaM/GB02P002mc.pr for user cui PHYS220 Midterm I (Last updated: Wed Jul 7 15:01:27 2004) Spring constant Don't Forget to Give Answers in Specifed Units ! If you have a Fgure in the present problem do not use the numbers shown in the Fgures. Please use the numbers given in the text of the problem unless you are asked to use the numbers from the Fgure! If a force of 5.0 N causes a spring to stretch 3.5 cm from its relaxed length, how far does a force of 7.0 N cause the same spring to stretch? What is the spring constant of this spring? 4.9 cm; 1.4 N/cm 1. 6.0 cm; 2.2 N/cm 2. 4.5 cm; 2.0 N/cm 3. 4.0 cm; 1.1 N/cm 4. ____________________ [weight: 1] 1 OK Maximum number of attempts for credit = 2 cui 220/spring2009 Homework Problem Listing https://chip.physics.purdue.edu/cgibin/220/spring2009/Instruct... 1 of 12 2/3/09 1:33 PM 220/spring2009 GiambattistaM/GB02P035mc.pr for user cui PHYS220 Midterm I (Last updated: Mon Jul 12 11:17:34 2004) Pushing a block on the foor Don't Forget to Give Answers in SpeciFed Units ! If you have a Fgure in the present problem do not use the numbers shown in the Fgures. Please use the numbers given in the text of the problem unless you are asked to use the numbers from the Fgure! A 3.0kg block is at rest on a horizontal ¡oor. If you push horizontally on the 3.0kg block with a force of 12.0 N, it just starts to move. (a) What is the coef¢cient of static friction? (b) A 7.0kg block is stacked on top of the 3.0kg block. What is the magnitude F of the force, acting horizontally on the 3.0kg block as before, that is required to make the two blocks start to move? (a) 0.41 ; (b) 40 N 1. (a) 0.41 ; (b) 98 N 2. (a) 0.37; (b) 68 N 3. (a) 0.25; (b) 98 N 4. (a) 0.37; (b) 40 N 5. ____________________ [weight: 1] 1 OK Maximum number of attempts for credit = 2 cui 220/spring2009 Homework Problem Listing https://chip.physics.purdue.edu/cgibin/220/spring2009/Instruct... 2 of 12 220/spring2009 GiambattistaM/GB02P035mc.pr for user cui PHYS220 Midterm I (Last updated: Mon Jul 12 11:17:34 2004) Pushing a block on the foor Don't Forget to Give Answers in SpeciFed Units ! If you have a Fgure in the present problem do not use the numbers shown in the Fgures. Please use the numbers given in the text of the problem unless you are asked to use the numbers from the Fgure! A 3.0kg block is at rest on a horizontal ¡oor. If you push horizontally on the 3.0kg block with a force of 12.0 N, it just starts to move. (a) What is the coef¢cient of static friction? (b) A 7.0kg block is stacked on top of the 3.0kg block. What is the magnitude F of the force, acting horizontally on the 3.0kg block as before, that is required to make the two blocks start to move?...
View
Full Document
 Fall '09
 CHANG
 Work, 1966, 1971, 1973, 1970

Click to edit the document details