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Gravitation

Total questions: 47

Worksheet time: 54mins

Name
Class
Date
1.

Newton’s Universal Law of Gravitation state that gravitational force, F is ______ to the product of mass of the objects and ______ to the square of the distance between the objects

Hukum Kegravitian Semesta Newton menyatakan bahawa daya graviti, F adalah ______ terhadap hasil darab jisim-jisim objek dan ______ terhadap kuasa dua jarak antara objek-objek

a)

directly proportional, directly proportional

berkadar terus, berkadar terus

b)

directly proportional, inversely proportional

berkadar terus, berkadar songsang

c)

inversely proportional, inversely proportional

berkadar songsang, berkadar songsang

d)

inversely proportional, directly proportional

berkadar songsang, berkadar terus

2.

F = G m1m2r2F\ =\ G\ \frac{m_1m_2}{r^2}  
What is represented by r in this formula?
Apakah yang diwakili oleh r dalam formula ini?

a)

Gravitational force between two objects
Daya graviti antara dua objek

b)

Universal gravitational constant
Pemalar kegravitian semesta

c)

Mass of object
jisim objek

d)

Distance between two objects
jarak antara dua objek

3.

Factors that affect gravitational force are

Faktor-faktor yang mempengaruhi daya graviti adalah

a)

mass of objects

jisim objek-objek

b)

velocity of objects

halaju objek-objek

c)

acceleration of objects

pecutan objek-objek

d)

distance between the objects

jarak antara objek-objek

4.

When the distance between two objects increases, the gravitational force __________

Apabila jarak antara objek-objek bertambah, daya graviti _________

a)

increases

bertambah

b)

decreases

berkurang

c)

unchanged

tidak berubah

5.

When the mass of two objects increases, the gravitational force _______

Apabila jisim antara dua objek meningkat, daya graviti ________

a)

increases

bertambah

b)

decreases

berkurang

c)

unchanged

tidak berubah

6.

This formula is used to find the value of g. What is g?

Formula ini digunakan untuk mendapatkan nilai g. Apakah itu g?

a)

Mass of Earth

Jisim Bumi

b)

Gravitational acceleration of Earth

Pecutan graviti Bumi

c)

Universal gravitation constant

Pemalar kegravitian semesta

d)

Distance between Earth and the object

Jarak antara Bumi dengan objek

7.

When the distance between object and Earth increases, Earth's gravitational acceleration _______

Apabila jarak antara objek dan Bumi bertambah, pecutan graviti Bumi ________

a)

increases

bertambah

b)

decreases

berkurang

c)

unchanged

tidak berubah

8.

Calculate the gravitational acceleration when the object is at 3R.
Kirakan pecutan graviti apabila objek berada pada 3R.

g = GMr2g\ =\ \frac{GM}{r^2}  

a)

2.5 m s−22.5\ m\ s^{-2}  

b)

3.3 m s−23.3\ m\ s^{-2}  

c)

4.9 m s−24.9\ m\ s^{-2}  

d)

9.8 m s−29.8\ m\ s^{-2}  

9.

Calculate the gravitational acceleration of Jupiter.
Kirakan pecutan graviti bagi Jupiter.

g = GMr2g\ =\ \frac{GM}{r^2}  

a)

3.7 m s−23.7\ m\ s^{-2}  

b)

10.42 m s−210.42\ m\ s^{-2}  

c)

25.94 m s−225.94\ m\ s^{-2}  

d)

274 m s−2274\ m\ s^{-2}  

10.

What happen to the centripetal force if the linear speed of the object is higher?

Apakah yang berlaku terhadap daya memusat apabila laju linear objek lebih tinggi?

a)

Centripetal force will be higher

Daya memusat akan lebih tinggi

b)

Centripetal force will be lower

Daya memusat akan lebih rendah

c)

Centripetal force will stay the same

Daya memusat akan tetap sama

11.

Which of the following shows the applications of centripetal force in our daily life?

Manakah antara berikut menunjukkan aplikasi-aplikasi daya memusat dalam kehidupan seharian kita?

a)
b)
c)
d)
12.

A piece of space junk of mass 24 kg is at a distance of 7.00 × 10^6 m from the center of the Earth. What is the gravitational force between the space junk and the Earth? [G = 6.67 × 10^-11 N m^2 kg^-2, mass of the Earth = 5.97 × 10^24 kg]

F = G Mmr2F\ =\ G\ \frac{Mm}{r^2}  

a)

12.4 N

b)

19.5 N

c)

26.6 N

d)

31.3 N

13.

M=4π2r3GT2M=\frac{4\pi^2r^3}{GT^2}
Figure shows Mercury orbiting the Sun with a radius of 5.79 × 10^10 m and a period of revolution of 7.57 × 10^6 s. Calculate the mass of the Sun. 

a)

1.5×10301.5\times10^{30}  kg

b)

1.8×10301.8\times10^{30}  kg

c)

2.0×10302.0\times10^{30}  kg

d)

2.5×10302.5\times10^{30}  kg

14.

Which of these law applies to that statement?

Manakah antara hukum-hukum berikut mengikuti penyataan tersebut?

a)

Kepler's First Law

Hukum Kepler Pertama

b)

Kepler's Second Law

Hukum Kepler Kedua

c)

Kepler's Third Law

Hukum Kepler Ketiga

15.

Choose the correct statement from Kepler's First Law.

Pilih penyataan yang betul daripada Hukum Kepler Pertama.

a)

The major axis is shorter than the minor axis.

Paksi major lebih pendek daripada paksi minor.

b)

The Sun always stays on a focus of the ellipse.

Matahari sentiasa menjadi fokus bagi elips.

c)

Planets can be assumed to make circular motion around the Sun.

Planet-planet dianggap membuat gerakan membulat mengelilingi Matahari.

d)

The radius of orbit = the average value of the distance between the planet and the Sun.

Jejari orbit = nilai purata jarak antara planet dan Matahari.

16.

Which of these law applies to that statement?

Manakah antara hukum-hukum berikut mengikuti penyataan tersebut?

a)

Kepler's First Law

Hukum Kepler Pertama

b)

Kepler's Second Law

Hukum Kepler Kedua

c)

Kepler's Third Law

Hukum Kepler Ketiga

17.

Which statements are true based on Kepler's Second Law?

Manakah penyataan yang betul berdasarkan Hukum Kepler Kedua?

a)

Time/Masa : AB = CD

b)

Area/Luas : AFB = CFD

c)

Distance/Jarak : AB < CD

d)

Linear speed/Laju linear : AB > CD

18.

Which of these law applies to that statement?

Manakah antara hukum-hukum berikut mengikuti penyataan tersebut?

a)

Kepler's First Law

Hukum Kepler Pertama

b)

Kepler's Second Law

Hukum Kepler Kedua

c)

Kepler's Third Law

Hukum Kepler Ketiga

19.

A planet which has larger radius, r will have a ________ orbital period, T.
Sebuah planet yang mempunyai jejari , r yang lebih besar akan mempunyai tempoh orbital, T yang ________


T2α r3T^2\alpha\ r^3  

a)

longer
lebih lama

b)

shorter
lebih singkat

c)

constant
malar

20.

At what height should a satellite be if the satellite is required to orbit the Earth in a period of 24 hours?
[Orbital period of the Moon = 27.3 days, radius of orbit of the Moon = 3.83 × 10^8 m]

a)

2.8×1072.8\times10^7 m

b)

2.9×1072.9\times10^7 m

c)

3.5×1073.5\times10^7 m

d)

3.6×1073.6\times10^7 m

21.

The escape velocity, v of an object depends on

Halaju lepas, v bagi sesuatu objek bergantung kepada

a)

mass of Earth

jisim Bumi

b)

mass of object

jisim objek

c)

distance of the object from the center of the Earth

jarak objek dari pusat Bumi

22.

The Earth has large mass, the escape velocity of an object from the Earth must be at ________ 11 200 ms-1 or 40 300 km h-1.

Bumi mempunyai jisim yang besar, maka halaju lepas sesuatu objek dari Bumi perlulah mempunyai ________ 11 200 m s-1 atau 40 300 km j-1.

a)

higher value than

nilai yang lebih tinggi daripada

b)

lower value than

nilai yang lebih rendah daripada

c)

same value as

nilai yang sama seperti

23.

Escape velocity is the ________ requirement for an object on the Earth's surface to overcome the gravitational force and escape to outer space.

Halaju lepas adalah keperluan _________ bagi sesuatu objek di Bumi untuk mengatasi daya graviti dan melepaskan diri ke ruang angkasa.

a)

minimum

minimum

b)

maximum

maksimum

24.

Compare the escape velocity from the Earth for spacecraft X of mass 1500 kg and spacecraft Y of mass 2000 kg.

Bandingkan halaju lepas daripada Bumi untuk kapal angkasa X yang berjisim 1500 kg dan kapal angkasa Y yang berjisim 2000 kg.

a)

X > Y

b)

X < Y

c)

X = Y

25.

Proba-1 satellite orbits the Earth at a height of 700 km. What is the linear speed of this satellite?

[G = 6.67 × 10-11 N m2 kg–2, mass of the Earth = 5.97 × 1024 kg, radius of the Earth = 6.37 × 106 m]

a)

4.52 x 103 m s-1

b)

7.49 x 103 m s-1

c)

9.37 x 103 m s-1

d)

12.26 x 103 m s-1

26.

Astronauts live in the ____________________ and conduct experiments.

a)

International Space Room

b)

International Space Station

c)

International Space Rocket

d)

International Space House

27.
People can find out their exact location on Earth by using a...
a)
Global Drection System (GDS) receiver.
b)
Regional Positioning System (RPS) receiver.
c)
Global Positioning System (GPS) receiver.
28.
A satellite that travels in an orbit that exactly matches the Earth's rotation is traveling in a(n)
a)
low Earth orbit (LEO).
b)
low stationary orbit (LSO).
c)
geostationary orbit (GEO).
d)
high Earth orbit (HEO).
29.

The velocity a rocket must achieve to establish an orbit around another object in space

a)

Orbit Velocity

b)

Velocity

c)

Space shuttle

d)

probe

30.

The velocity a rocket must reach to escape from a planet or moons gravitational pull

a)

Vacuum

b)

Satellite

c)

Escape velocity

d)

Geosynchronous orbit

31.
Which of the following is needed to calculate escape speed for a rocket from earth?
a)
mass of fuel used in the rocket
b)
mass of the rocket
c)
mass of Earth
d)
all of the above
32.

Calculate the escape velocity of a satellite in an orbit 300 km above Earth’s surface. Given G = 6.67 x 10^-11 N m^2 kg^-2, radius of earth is 6370 km and mass of the earth is 5.97 x 10^24 kg.

a)

7.73 km s^-1

b)

10.9 km s^-1

c)

36.4 km s^-1

d)

244 km s^-1

33.

Which of the following is true about non-geostationary satellites?

a)

Its orbital period around the earth is one day.

b)

It is at a height of (35000-36000) km above the equator of surface of the earth.

c)

Example of the satellites are GPS.

d)

It can be in an orbit of which is very close to the surface of the earther or very further away from the surface of the earth.

e)

Example of the satellites are communication satellites.

34.

Acceleration of a satellite is ______


A)  GMr\sqrt{\frac{GM}{r}}  
B)  GMr2\frac{GM}{r^2}  
C)  GM1M2r2\frac{GM_{1_{ }}M_{2_{ }}}{r^2}  

a)

A

b)

B

c)

C

d)

none of the above

35.

Two satellites orbit a moon. Satellite A and Satellite B. Satellite B is twice as far away from the moon. Its speed should be ____

a)

half as much as the speed of A

b)

less than the speed of A but not exactly half as much

c)

twice as great as the speed of A

d)

greater, but not twice as great as A

36.

A satellite orbits a moon at radius r, if the moon were to gain a significant amount of mass from asteroid collisions, the speed of the satellite will ___

a)

increase

b)

decrease

c)

remain unaffected

d)

depends on the mass of the satellite

37.

A space donut orbits a planet in an elliptical orbit... The donut is moving the SLOWEST at ____ (see image)

a)

r1

b)

r2

c)

it is the same speed at every part of its orbit

d)

none of the above

38.
Planets orbit the Sun in a shape called a(n)
a)
circle
b)
ellipse
c)
focus
d)
perihelion
39.
An ellipse is drawn around two points called
a)
aphelion
b)
perihelion
c)
foci
d)
axis
40.
When a planet orbits the Sun, one of the foci of the elliptical orbit is 
a)
the axis
b)
the perihelion
c)
the center
d)
the Sun
41.
Where is the planet moving faster
a)
Position A to B
b)
Position B to C
c)
Position H to I
d)
Position I to J
42.
What is true about the area between points A, B and the Sun, and the area between points H, I and the Sun?
a)
The area between A, B and the Sun is the largest.
b)
The area between H, I and the Sun is the largest
c)
Both areas are equal in size
d)
There is not enough information to determine the areas
43.
Kepler's 2nd Law deals with 
a)
the shape of the planets' orbits
b)
the speed/area the planet travels 
c)
the length of time it takes the planet to orbit the sun
44.
A planet moves __________ when it is farthest from the sun.
a)
faster
b)
slower
45.
The farther away a planet is from the sun, the _______ it takes it to orbit the sun once. 
a)
longer
b)
shorter
46.
The path a planet travels around the sun is called its 
a)
orbit
b)
ellipse
c)
barycenter
d)
precession
47.
Two factors effecting the magnitude of the force of gravity between 2 objects are...
a)
mass and distance 
b)
mass and matter
c)
distance and weight 
d)
weight and mass

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