# Physics questions – Acceleration, momentum and velocity

Obtain?} g-10m/s^-2
Give answers to 2 indicative figures.Formulas and calculations required ce integral answers.
A
racing bike is nature put through its paces on a direct tighten of route by a
stunt unnaturalness.  The peaceraintthcoming celerity-spell graph was obtained upon analysis
of the bike?s work characteristics:
1.
a)
Rate the interval travelled by the bike during the chief 40 seconds.
b)
What was the succor of the bike following it working from quiet?:
(i)
5seconds
(ii)
22seconds
(iii)
50seconds
2.On the
Penetecost Isdemesne there is an preparation ceremony named plant diving. The
islanders spring from a exalted platform with a rope made of vines immovable to their
ankles. The ropes are contrived to fetch the plant multifarious to a seal honorable
centimeters aloft the basis following they own procumbent.
a)Calculate
the celerity of a plant diver professiony he set-outs from quiet, declines 25meters, and
that attrition is negligible
b)
How desire does it obtain?} ce the diver to fintegral the 25meters lower the swing of
gravity?
After
travelling 25meters the vines immovable to the plant diver?s ankles set-out to
tighten and source the plant diver to decelerate and object to a seal. The vine
stretches by 50centimeters.
c)
Rate the lump of the deceleration of the plant diver whilst
stopping.
3.A arrest
on the object of a string 3meters desire is swung in an anticlockwise tame
divergence with a trustworthy hasten of 5m/s. You are looking down (bird?s-eye representation) on
to this tame divergence.

a)
On the diagram aloft sketch, using arrows, the instant celerity of
the arpeace at the South (S) situation and at the East (E) situation.
b)
What is the modify in celerity (lump and superscription) of the arpeace as
its excitement modifys from the south (S) situation to the East (E) situation in its
circular method?
4.A car
of bulk 800kg accelerates from quiet to 20m/s^-1 in 8.0s. The opposition ceces
acting on the car whole 1000N.
a)Draw
a polite markled diagram professioning integral ceces acting on the car. Clearly profession the
point of collision of each cece, ie, profession where each cece set-outs.
b)Calculate
the driving cece nature granted by the engine of the car.
5.
a)
On the diagram aloft, sketch and mark couple arrows that profession the operation-reaction
forces acting on the rope betwixt the boat and the skier. Use the learning ?A?
ce operation, and ?R? ce reoperation proximate to your arrows.
b)
Complete the couple sentences adown which portray the operation-reoperation two aloft.
Action:
The cece of the……….on the…………
Reaction:
The cece of the  …………on the………..
c)
Rate the lump (size) of the draw (resistance) ceces acting on the
skier.
6. A vision car of bulk 50grams
travels down a calm rest at 30 degrees to the tame. Attrition may be
ignored.
a)
Rate the entrap cece acting on the car as it rolls down the mount.
b)
Rate the cece of the rest on the car as it travels down the mount.
7. A car drives
a) How desire does the car obtain?} to plant?
b) How distant does it plant from the corrupt of the headlong?
c) Using perpendicular and tame celerity components, what
is the car?s celerity honorable antecedently it plants? State the lump and superscription
(Use cemula(s), calculations and a vector diagram)
8. A catapult launches a marble, of bulk 100grams at 25m/s
at an predilection of 30 degrees aloft the tame.
a) What is the culmination climax reached by the marble?
b)What is the spell of flying of the marble?
What is the lump and superscription of the succors of
the marble at: (Answers undivided dot-point sense required)
(i)
X
(ii)
Y
(iii)
Z
9. A tennis bintegral of bulk 100g hits the wintegral tamely at
8.0m/s^-1 east and rebounds at 6.0m/s^-1. The touch spell with the wintegral is
0.07s.
a) rate the sudden-thought on the bintegral by the embankment
b)rate the modify in momentum of the sphere
State the lump and superscription ce a) and b)
A vector diagram, cemula(s) and calculations required.
10. Rate:
a) The cece exerted on the bintegral by the embankment
b) The cece exerted on the wintegral by the sphere
State the lump and superscription ce a) and b)
Formulas and calculations required.

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