2º EM - BALLISTIC: OBLIQUE LAUNCHING

Students, continuing our studies of ballistics, we will, in today's class, do tests involving oblique throws. To do this, go to the link below:

https://phet.colorado.edu/sims/html/projectile-motion/latest/projectile-motion_pt_BR.html

After accessing, enter the last icon: Lab. Place the cannon at a 25° angle. Select a 0.5 m diameter cannonball, mass 10 kg, turn off air resistance, select a velocity of 16 m/s and fire the cannon (red icon at the bottom). Measure horizontal reach, maximum height reached and movement time. Keeping the cannonball and launch velocity, repeat the procedure for the slopes indicated in the table below.

ANGLE	MAX. HEIGHT	HORIZ. REACH	TIME
25°
30°
35°
40°
44°
45°
46°
50°
55°
60°
65°
70°
80°
85°
90°

Questions:

For which slope does the maximum range occur?

For which slope does the maximum height occur?

What happens when we compare the ranges of complementary slopes?

Changing the bullet mass to 30 kg and keeping the other parameters, complete the table below:

ANGLE	MAX. HEIGHT	HORIZ. REACH	TIME
30°
45°
60°
90°

Changing the bullet diameter to 1.0 m and keeping the other parameters from the initial situation (m = 10 kg, v = 16 m/s, without air R.), complete the table below:

ANGLE	MAX. HEIGHT	HORIZ. REACH	TIME
30°
45°
60°
90°

Compare tables 1, 2 and 3 and draw conclusions.

Now putting air resistance, complete tables like above for the following situations:

a-) m = 10 kg, d = 0.5 m, v = 10 m/s and v = 16 m/s (2 tables)

b-) m = 10 kg, d = 1.0 m, v = 10 m/s and v = 16 m/s (2 tables)

c-) m = 30 kg, d = 0.5 m, v = 10 m/s and v = 16 m/s (2 tables)

d-) m = 30 kg, d = 1.0 m, v = 10 m/s and v = 16 m/s (2 tables)

CONCLUSIONS: