Lecture 2 Homework Problems P1. What must be your car's average speed in order to travel 235 km in 3.25 h? Solution:
km h
km/h cm during the time from
P5. A rolling ball moves from cm to s to s. What is its average velocity? Solution: m/s
P9. A person jog
Homework Problems Lecture 1 P2. How many significant figures do each of the following numbers have: a+b #"% a,b )"'! a- b (!$ a. b !$ a/b !)' a0 b $#$' a1b )(! Solution: a+b #"% oe #"% , "!# 3 significant digits a,b )"'! oe )"'! , "!" % significant digits
Homework Chapter 07 P1. What is the magnitude of the momentum of a 28-g sparrow flying with a speed of 8.4 m/s? Solution: kg m/s kg m/s
P3. A 0.145-kg baseball pitched at 39.0 m/s is hit on a horizontal line drive straight back toward the pitcher at 52.0
Chapter 08 Homework solutions P1. Express the following angles in radians: (a) 30, (b) 57, (c) 90, (d) 360, and (e) 420. Give as numerical values and as fractions of Solution: ( )
rad rad rad rad rad
rad rad rad rad rad
rad rad rad rad rad
P5. A child r
Chapter 3 Homework Solutions P: 1, 7, 9, 11, 13 P1. A car is driven 215 km west and then 85 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)? Draw a diagram. Solution:
N
W D2y
D2x 45
D1 =215 km D2 =85 k