Forces

The Head-to-Tail Method

Adding Vectors Graphically, Tip to Tail

← Forces Not at 90° All Lessons Equilibrium →
Do Now warm-up prompt

Head-to-Tail Method — draw vectors tip-to-tail; the resultant runs from the first tail to the last tip.

Given

Two forces, 3 N and 4 N, act at an angle of 90° to each other.
Find: the resultant of these forces.

Review — Weightlessness

Weightlessness Video

Zoom PBS (Flash Version)

"Weightlessness" Video
Zoom - PBS

(QuickTime Version)

Monster Shoot Out Game

Monster Shoot Out Game
Show Me The Physics

Vector Resultants Simulation

[ Flash ]

Finding Resultants

“Head to Tail”

Head-to-tail vector diagram, step 1
Head-to-tail vector diagram, step 2
↓

R = 5 N, 37° N of E

Head-to-tail vector diagram
Head-to-tail resultant diagram
↓

R = 13 N, 22.6° N of W

Head-to-tail vector diagram
Head-to-tail resultant diagram
↓

R = 45 N, 63° S of W

Try This at Home!

The Coanda Effect

Show Me The Physics
YouTube Channel

School blocks YouTube?
Download the file below.

Bernoulli's Effect.mp4

When a fluid moves in a single direction, it exerts very little pressure perpendicular to the direction of its flow. The external air pressure keeps the ball in place.

Equilibrium →