College Physics (AP101)

CH5 Applying Newton's Laws

1-D equilibrium—Figure 5.1

· Consider an athlete hanging on a massless rope.

· Follow Example 5.1.

1-D equilibrium considering the rope—Figure 5.2

· If we re-did the previous example in a less ideal world? The weight of the rope should be included.

· Refer to Example 5.2.

A crate on an inclined plane—Figure 5.4

· An object on an inclined plane will have components of force in x and y space.

· Refer to Example 5.4.

Consider a mass on a plane tied to a cord over a pulley

· You must draw two-free body diagrams.? The tension from the mass hanging is the same force that draws the cart up the ramp.

· Refer to Example 5.5.

Straight-line motion with constant force—Figure 5.7

· Consider the sailboat mounted on an ice skate.

· Refer to Example 5.6.

Consider motion against friction—Figure 5.8

· Earlier, we considered the effect of using “real” rope in a tension calculation.? How about friction at work in a problem that slides an object?

· Consider Example 5.7.

Calculation of tension in an elevator cable—Figure 5.9

· The elevator mass is balanced by tension in the cable (that’s why they have that “maximum capacity” sign on the wall).

· Refer to Example 5.8.

More adventures in the elevator—Figure 5.10

· The elevator allows riders to experience different weights (without dieting).

· Refer to Example 5.9.

Acceleration down a hill—Figure 5.12

· If you grew up in the northeast, you could often ride on snow and ice in the winter using sleds.

Two bodies with the same magnitude of acceleration

· A glider on the air track connected over a pulley (滑轮) to a falling mass.

· Refer to Example 5.12 using Figure 5.15.