{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

2011test2v2

# 2011test2v2 - Phys 100 Fall 2011 Concepts of Physics Class...

This preview shows pages 1–3. Sign up to view the full content.

Phys 100 Fall 2011 Concepts of Physics: Class Test II 31 October 2011 Name: Total: /50 Instructions There are 9 questions on 5 pages. Show your reasoning and calculations and always justify your answers. Physical constants and useful formulae speed = distance traveled time elapsed s = d t acceleration = change in velocity time elapsed a = v t distance = 1 2 × acceleration × time 2 d = 1 2 × a × t 2 final speed = initial speed + acceleration × time v f = v i + a × t acceleration = net force mass a = F m earth’s gravitational force = mass × 9 . 8 F grav earth = m × 9 . 8 KE = 1 2 × mass × (speed) 2 KE = 1 2 m × v 2 gravPE = mass × 9 . 8 × height PE = m × 9 . 8 × h power = energy gain time elapsed P = E t efficiency = useful energy output energy input ε = E output E input frequency = 1 time per cycle f = 1 T wave speed = wavelength × frequency s = λ × f

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

View Full Document
Question 1 Two balls are thrown upward above the ground. Ball A has mass 4 kg and ball B has mass 2 kg . At a given moment their positions are as illustrated and ball A moves with speed 8 m/s while ball B moves with speed 10 m/s. A 4 m B 6 m a) Which of the following (choose one) is true?
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 5

2011test2v2 - Phys 100 Fall 2011 Concepts of Physics Class...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online