Chapter 2 Solutions - (calculations)

Problem 5 (7):

a)

b) At t = 0 Sec, x = 0 m. At t = 4 Sec, x = 12 m. Then Δx = - = 12 - 0 = 12.

c) Between 2 Sec and 4 Sec, x changes from -2 m to 12 m. Then Δx = 12 - (-2) and Δt = 4 - 2, so == = 7 M/Sec.

d)

Problem 10 (8): See homework solutions

Problem 61: See homework solutions

Problem 96 (1):

Problem 116 (44):

a) Call y = 0 at ground level, positive y upwards. Ball lands at a time where y = 0. (A slightly different approach is taken in the homework solutions)

Take the positive value.

b)

c) Now a = 25*9.8 M/and is directed upward. First find t:

Now use this to find y:

Created by Mathematica (August 29, 2005) |