NARIKA DYB User manual

Instruction manual
C15-1631-W0
Dynamic cart set of large-size wooden
cart and two metallic carts DYB
&
C15-1631-W1
Large-size wooden dynamic cart DYB-1
Apr2021

Safety Precaution
Do not disassemble, repair and remodel this product. This productmight stop
working and warranty will be void.
Teacher or trainermustinstruct students about the safe ways of conducting
experiments with this product before actually conducting experiments.
When you find that something is broken, please do not repair the product by
yourself and contact your distributor.
Do not get on the productor do not use the product as a skate.
Make sure totake measures against the product falling down from the table
during experiments. It mightcause damage to the product.
Name of each part
①Large-sizewoodendynamiccart ②A wooden boardfor making a slope
③A wooden block for making a slope ④A wooden stick
⑤Metallic dynamiccart DY-5 (one pair) (C15-1622-W0)
* There are 2removable wooden barriers at both ends of the large-size cart (when theyare
attached the weight of the large-size cart is 1kg)
Specification
①
②
③
④
⑤

①Large-sizewoodendynamiccart: Size: 1,100× 160 ×78mm, Mass:1kg(±0.05 kg)
②A wooden boardfor making aslope: Size:1,000× 150× 4mm,
③A wooden block for making a slope: Size:90 ×35 ×150mm,
④A wooden stick: Size: φ6mm × 170mm,2 pcs
⑤Metallic dynamic cart DY-5 (one pair) (C15-1622-W0)
*This set(C15-1631-W0) includesthese 2metallicdynamic carts.
Size:(L)303 x(W)102x(H)95mm
Weight:1kg (±0.002 kg)
Material: Body: Steel,Wheels: ABSwithaballbearing
Accessories: force sensor anchoringrodx1pc, springbalanceholdingmetalbracketx1pc
Description of Large-size wooden dynamic cart
Large-size wooden dynamic cart (C15-1631-W1) is designed to be used in combination with metallic
dynamic cart DY-5 (C15-1622-W0) for a variety of dynamics experiments. Additionally, the top of the
large-sizewoodendynamiccartisspaciousenoughtoloaduptotwometallicdynamiccartsforavariety
ofmotionexperiments.
Furthermore, it is easy to calculate and then analyze results of experiments because each cart of the
set(onewoodenandtwometalliccarts)weighs1kg.Thatenablessimplecalculationwhensubstituting
themass(m=1)tomotionequation.
Experiment Guide
1. The law of inertia (Newton's first law)
Fig.1
This is a simple experiment to demonstrate the inertia motion (Newton's first law) using the large
wooden cart and a metallic cart. Place a metallic cart on top of the large wooden cart and move the
largewoodencarttoleftandrightswiftlybyyourhands.Learnerswillobserveametalliccartnotmowing
while the large wooden cart is moving.
2. The law of conservation of momentum in collisions (Newton’s third law)

Fig.2
A. Experiment ofnormalcollisionbetweentwocartswhichhavethe samemass.
1)Setastickononeendofthelargewoodendynamiccartandsetananchoringrodofforcesensorto
themetallic dynamic cart. Note:Massof eachcart is 1 kg.
2) Tiethestick of woodencart to theanchoringrodofmetallic cartwitha rubberband (seeFig.2).
3) Place astickin themiddlebetweenthetwo carts(see Fig.2).
4) Move the carts apart around the same distance from where the stick is placed in the middle (the
recommended distancebetweenthemislessthan30cm).
5) Ifyoureleasethemat thesametime, thetwocarts are goingtocollide in the middle, and then each
cart isgoingtomovebackto itsoriginalposition.
B. Experiment ofcollisionbetweentwocarts withdifferent masses
1)Setastickononeendofthelargewoodendynamiccartandsetananchoringrodofforcesensorto
themetallic dynamic cart. Note:Massof eachcart is 1 kg.
2) Place the other metallic dynamic cart on the wooden dynamic cart (see Fig. 2) to double its mass.
Therefore, themass ratio of metallic cart and woodencart unit (withametalliccart ontop) is1: 2.
3) Tiethestick of woodencart to theanchoringrodofmetallic cartwitha rubberband (seeFig.2).
4) Place astick in the middle between twocarts (see Fig. 2).
5) Move the carts apart around the same distance from where the stick is placed in the middle (the
recommended distancebetweenthemislessthan30cm).
6) If youreleasethematthesametime,thetwocarts are going to collidein the middle, and theneach
cart isgoingtomovebackto itsoriginalpositioneventhoughtheir masses aredifferent.
Additional information: because the metallic cart on top of the wooden cart can move freely without
almost anyfriction,itsmassdoesnotplayanyroleinthecollisionduetothelawof inertia.On the other
hand, if we would fix the metallic cart (for example placed it upside down) onto the wooden cart, its
massdoesplayaroleinthecollisionandthenthecollisiondoesnotoccurinthemiddlewherethestick
is placed.

3. The motion of an object going down a slope (Newton's second and third law)
Make an inclined plane (slope)using a wooden block anda wooden board on the large-size wooden
dynamic cart (a) and put the metallic dynamic cart (b) on the inclined plane (see Fig. 3). While the
metallic cart (b) is going down the inclined plane, the motions of the wooden cart (a) and the metallic
cart(b)canbedemonstratedtolearners. Consequently,thewoodencart(a) willmovebackwardwhen
themetallic cart (b) willmove forward in Fig. 4.
Thepurpose of the demonstration using two carts (a and b) is that learners analyze what forces drive
thecartsmovementinthedemonstration.
Fig.3 Fig. 4
Description of Metallic dynamic cart DY-5 (C15-1622-W0)
①Plunger anditsshaft ②Plunger Launcher
③Screw holefor a forcesensor ④Knobof anti-moving stopper
anchoringrod
⑤M4 screw holes (⌀4mm) ⑥Button for holding a recording paper
⑦Force sensor anchoring rod ⑧Hole for a spring balance hook
⑨Bracket for holding a spring balance ⑩Velcro Tape
b
a

[Plunger]
Turning the head of the plunger anticlockwise
unlocks it and it pops out from the body a little bit.
When storing the repulsion bar, insert the repulsion
bar intothebodyandturnitclockwisetotighten.
[Releasing the plunger]
The plunger has three indentation on itself. The
pushing strength out depends on the position of the
indentation. Pulling the plunger launcher up at an
indentation position will place the plunger at the
requestedposition.If youpresstheplungerlauncher
theplungerwill bereleasedat once.
[Setting a recording paper]
Whenusingasparktimerwiththedynamiccart, set arecordingpaper ofthetimerupthebody. Atfirst,
insert the recording paper into a hole at the lower part on the opposite side of the plunger side (Velcro
Tape side). And pressing the button will fix the paper to the cart. The maximum width of the recording
paper is15mm.
[Use a force sensor]
In thecase of using a force sensor of a data loggeror computer withthis dynamic cart,at first, remove
theforce sensor anchoring rod(part No. 7) from beneath the bottom. Set it at the screw hole (part No.
3).Then set theforcesensoron therod.NarikarecommendstheDataHarvestforcesensor.

[Mount a spring balance]
Narika's spring balance SO series (Catalog number: A05-4053-W1, W2, W3, A05-4054-W1) can be
mountedon the ’s top of the cart to measure the forcestrengths in experiments. Abracket (part No. 9)
holding a spring balance on the top is beneath the body. Remove the bracket from beneath the body
and set it onthe top with aknurled screw.Thenplace and fit the springbalance
intothebracketon thetop.
[Use ofan anti-moving stopper]
The dynamic cart is equipped with an anti-moving stopper (part No. 4) to keep it from rolling down on
an inclined plane or on a table during experiments. Rotating clockwise the knob on the top of the cart
until the stopper touching to the surface can stop the cart on the inclined plane or the table during the
preparation of experiments. If turningtheknobanticlockwise, it willreturnto its originalposition and the
cart willfreelymove.
[Attaching a Camera]
Ifyouscrewtheforcesensoranchoringrod(partNo.7)tothescrewhole(partno.3)theother
way,thenwhenyou wereusingitwithforcesensorthenyoucanattachacameratothebody.
Size of the screw is 1/4-20 UNC.

[Velcro Tape]
This dynamic cart has a Velcro tape (part No. 10) to joint another cart. For example, when a slowly
moving cart contacts a standing cart, these two carts are jointed like a train and keep moving. This
Velcro tape is useful for experiments of the momentum conservation law or inelastic collision studies
andothers.
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