## ΒΑΡΥΤΗΤΑ ΚΑΙ ΕΠΙΤΑΧΥΝΣΗ Απευθύνεται σε μαθήτριες και μαθητές του Λυκείου,Πραγματεύεται τις κοινές διαπιστώσεις παρατηρητή όταν βρεθεί μέσα σε κινούμενο ανελκυστήρα ή μέσα σε βαρυτικό πεδίο.

## Σάββατο 15 Σεπτεμβρίου 2012

### HORIZONTAL MOTION - EXERSICE.

THEORY

Equations for x-axe
Equations for y-axe
Equation of motion y-x
Total time of flight
Range
Total velocity

Projectile motion on a planet

A projectile is launched horizontally from a cliff on a planet in a distant solar system. The graph
below plots the horizontal (x) and vertical (y) positions of the projectile every 0.5 seconds.

(a) Determine the initial velocity with which the projectile was launched.

b) How can you tell from the plotted data that the planet’s atmosphere had no significant effect
on the motion of the projectile?

(c) Calculate the value of the acceleration.

(d) Draw vectors to represent the horizontal and vertical components
of the velocity at the point F.

(e) Determine the vertical component and the total value of the  velocity of the projectile at the point F.

f) What will happen if the atmosphere had significant effect on the motion?

(g) Another projectile is fired at half the speed of the first one. On the graph , plot the
positions of this projectile for time intervals of 0.5 s.

#### 2 σχόλια:

1. a: v(x)=10m/s
b: a=constant
c: a=8m/s^2
d: v(y)=20m/s
e: v=√500m/s and tan=2
f: v(y)=constant
g: x=12.5m and y=25m

1. 