3B SCIENTIFIC PHYSICS U10362 Інструкція з експлуатації

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3B SCIENTIFIC

3B SCIENTIFIC® PHYSICS

3B SCIENTIFIC

Instruction sheet

9/04 MH

1 2 3 4

Fig. 1: Components

1. Safety instructions

• This instruction sheet is concerned mainly with the

ballistic pendulum. You should also read the in-

structions for the projectile launcher U10360.

• To check whether a projectile is located in the pro-

jectile launcher and the spring is cocked, only use

the observation holes at the sides. Do not look into

the barrel from the front. Risk of injury!

• Never aim at people!

• Protective goggles should be worn during the ex-

periments.

• The projectile launcher should always be stored

with the spring loose and with no projectile in the

barrel.

2. Description

• The ballistic pendulum is for experiment-based

determination of the launch velocity of a projec-

tile when it leaves the projectile launcher. It is also

possible to determine trajectories when the pro-

jectile is launched horizontally or at an angle.

Launch heights of 5, 10, 15, 20 or 30 cm can be

selected easily with the aid of the drilled holes.

• Thanks to the extreme lightness of the pendulum,

the experiment can be performed using compara-

PHYSICS

U10362 Ballistic pendulum

Projectile launcher (U10360)

Back plate

Guide for swing pointer

Bearing screw

Counter bearing

Swing pointer

Angle scale

Pendulum

Projectile catcher

Base plate

Table clamp

Knurled screw

Ramrod (for U10360)

Extra weights, 2 pcs.

tively safe plastic projectiles instead of steel balls.

Experiments involving inelastic collisions (quanti-

tatively) and elastic collisions (qualitatively) can be

evaluated. The velocity of the projectiles deter-

mined from trajectory and pendulum experiments

typically agree to within about 3%.

• Extra weights allow various pendulum travels to

be investigated for constant speeds.

3. Operation and maintenance

• First the ballistic pendulum is screwed to a stable

bench by means of its clamp. The projectile

launcher is then screwed to the back plate

behind either in a horizontal position in front of

the pendulum as in Fig. 1 or as shown in Fig 3.

Tip: if the workbench is not stable enough, it may

be that when the pendulum swings to its maximum

extent and then swings back, it may jog the appa-

ratus when striking the projectile launcher, caus-

ing the swing pointer to be shifted out of line. If

this happens, the pendulum should rather be

stopped by hand.

• Projectiles should always be loaded when the sp-

ring is not under tension by placing the sphere in

loosely through the front of the plastic cylinder

rom