Static Equilibrium
From Bensons University Physics: E29, E31, E32, E34, E40, P18, P19, P20, P21
Answers:
E29: T1 = 417 N; T2 = 298 N
E31: W 768 N; At W = 768 N, H = 500 N and V = 98 N
E32: T = 44 N; H = 34.5 N; V = 2.13 N
E34: T = 466 N (Cant use F = 0; s
Rigid Body Dynamics I: Kinematics and Energy
Note: Icyl = MR2; Iwheel = MR2; Isphere = 2/5 MR2; Irod = 1/3 ML2 (end) or 1/12 ML2 (middle)
1. A wheel, initially at rest, has an angular acceleration that results in it rotating at 40.0 rpm after 5.00
seconds
Rigid Body Dynamics II: Torque and Angular Momentum
Note: Icyl = MR2; Iwheel = MR2; Isphere = 2/5 MR2; Irod = 1/3 ML2 (end) or 1/12 ML2 (middle)
1. Two blocks are connected by a rope which passes over a 5.00 kg, 40.0 cm radius pulley that is a
solid disk.
Simple Harmonic Motion (All springs are massless.)
1. A 64.0 N/m spring has a 4.00 kg mass attached to its end. The mass is on a frictionless surface and
is free to move horizontally. The mass is pulled out 30.0 cm and released from rest. Find the period
Newtons Laws of Motion II
1. Three blocks are lined up as shown in the figure (left to right: 5.00 kg, 3.00 kg, 2.00 kg); a 20.0 N
force to the right is applied to the leftmost block. Draw explicit free body diagrams for each block and
determine the accel
Circular Motion
1. A 5.00 kg block is being rotated in a 2.00 meter circle by a string whose maximum allowed tension
is 300 N. Find the maximum speed of the block.
2. A car is moving around a 100.0 m circular track at 25.0 m/s. Find the minimum coefficien
Work, Energy, Power Note: where possible, use WorkEnergy methods to solve these problems!
1. Find the angle between the vectors A = 2i + 4j 5k and B = 3i 6j 8k.
2. A 20.0 kg box is being pulled across the floor by a 30.0 N force making an angle of 36.9 wi
Conservation of Energy. USUC means unstretched and uncompressed.
1. Solve this problem using workenergy techniques! An 80.0 kg sky diver jumps out of a balloon
at an altitude of 1000 meters. He opens the parachute when he is a height H above the ground. T
Impulse and Momentum
1. A 5.00 kg object has a kinetic energy of 40.0 J. Find its momentum. If the object started from rest,
and a force acted upon the object for 6.00 s in order to give it those 40.0 J, find the average value of
that force over those 6.0
Friction
1. A 5.00 kg block is be moved by a force F inclined at 30.0 above the horizontal. The coefficients
of friction are s = 0.200 and k = 0.100. (a) What is the minimum value of F necessary for the block
to begin to move? (b) At that F, what will be
Newtons Laws of Motion I (all ropes are massless and all pulleys are massless and frictionless)
1. Forces of 6.00 N and 4.00 N act on a 5.00 kg block. Find the magnitude of the acceleration of the
block if the forces are (a) parallel; (b) antiparallel; (c
1D Kinematics, (assume constant acceleration unless told otherwise), no free fall
1. An object starts from rest and accelerates at 3.00 m/s2. Find its position and speed at t = 8.00 s.
2. An object starts from rest and is found 100 m from its starting pos
Homework Sets P2 and P4b:
P21. If A = 2i + 3j and B = 4i + 2j, find A + B and A B in both component and distanceangle
formats.
P22 A surveyor lays out a plot of land starting from a red stake. The deed reads, in part, Move 150
feet at 35 N of E, then 200
Projectile Motion
1. An object slides of off a 1.30 meter tall horizontal table and hits the floor 2.00 m from the edge of
the table. With what speed did it leave the table, and with what speed did it hit the floor?
2. A father and daughter are playing ca