{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Exam1-practice-solutions-Phys172-2010spring

# Exam1-practice-solutions-Phys172-2010spring - Phys 172 Exam...

This preview shows pages 1–5. Sign up to view the full content.

Phys 172 Exam 1, 2010 fall, Purdue University What to bring: 1. Your student ID – we will check it! 2. Calculator: any calculator as long as it does not have internet/phone connection 3. Pencils Exam will take place in Elliot Hall of Music. When entering hall, please take a writing board (available at the entrance). Please prepare to be seated in “exam formation” – each other row and each other seat. Turn off your phone and keep it in your bag/pocket at all times Equation sheet is provided at the end of the exam. You can tear it off and use, you do not have to return it. At the end of the exam please turn in your scantron sheet and paper exam to one of the TAs (don’t forget to sign your paper exam at the right-top corner).

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Problems 1-3 For the next four problems consider vectors in the diagram shown below, in which each division is equal to 1 m. Problem 1 (5 pts) What are the components of the vector a ? A) <8, -1> m B) <9, 2> m C) <-1, 8> m D) <3, 4> m E) <4, 3> m Problem 2 (5 pts) What is the magnitude of the vector a ? A) 8.06 m ( ) 2 2 8 1 + - = a B) 9 m C) 8.21 m D) 8.32 m E) 5 m Problem 3 (5 pts) Which one of the following statements is true about vectors a , b , c and d ? A) 0 = + + + d c b a B) d c b a & - = + C) b c a = + D) b c a + = E) c b a = - x H a b c d &

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
A tennis ball of mass 57 g is served in horizontal direction along x -axis and initially flies at speed 60 mph. Problem 4 (5 pts) What is the initial magnitude of its momentum? A) 3420 kg . m/s B) 1.5 kg . m/s hour onds mile meters hour miles kg mv p sec 3600 1600 60 057 . 0 × × = C) 1500 kg . m/s D) 3.42 kg . m/s E) 22.1 kg . m/s Problem 5 (5 pts) What is the magnitude of the x -component of this tennis ball after 1 second? (gravitational force on the ball is downwards in - z direction) A) 2.1 kg . m/s B) 3420 kg . m/s C) 1.5 kg . m/s, since there is no force component in horizontal direction momentum component in this direction cannot changing (momentum principle) D) 3900 kg . m/s
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 12

Exam1-practice-solutions-Phys172-2010spring - Phys 172 Exam...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online