Soal RSBI IX Genap 2011

1. Study the table of quantities and their units below.

No	Quantities	Units
1	mass	kilogram
2	speed	meter per second
3	electric current	ampere
4	force	newton
5	temperature	celsius

Based on the table above, the correct pair of fundamental quantities and their SI units is….

A. 1, 2 and 3
B. 1, 3 and 5
C. 2 and 3 
D. 1 and 3

2. The figure on the right shows the diagram of the homemade thermometer which is called Thermometer X. The temperature of warm water in Celsius is 40 ^oC. The temperature of the water in Thermometer X is ….
A. 28^o X

B. 48^o X
C. 68^o X
D. 88^o X

Soal Kelas VIII

Choose the correct answer!

1. The force included in long range force is ….

A. Friction

B. The earth gravitational force

C. Buffalo’s force when it pulls a plough

D. Child’s force when he takes up chair

2. When a net force act on body, the body accelerates. It is statement ……

A. Newton’s 1st law

B. Newton’s 2nd law

C. Newton’s 3rd law

D. Newton’s 4th law

3. A block is placed on the floor. The block is pulled by horizontal force of 10 N. The friction worked between the block and the floor is 2,5 N. The resultant force worked on the block in horizontal direction is ….

A. 12,5 N in the same direction with the block movement

B. 12,5 N in the opposite direction with the block movement

C. 7,5 N in the same direction with the block movement

D. 7,5 N in the opposite direction with the block movement

4. The weight of stone is 50 N. If on the earth acceleration due to gravity is 10 m/s2, then the mass of the stone is …

A. 6 kg

B. 5 kg

C. 4 kg

D. 3 kg

5. The astronaut’s weight is 360 N on the earth. If on the moon acceleration due to gravity is 1/6 of acceleration due to gravity on the earth, then the astronaut’s weight on the moon is …

A. 20 N

B. 40 N

C. 60 N

D. 80 N

6. The following phenomena related to the contact force is …

1) a mango fall from its tree

2) to push a table

3) magnet attracts nails

4) a horse pulls truck

The correct statements are ….

A. (1) and (2)

B. (2) and (3)

C. (1) and (3)

D. (2) and (4)

7. A body with the mass of 10 kg is pushed with force of 20 N, so that it move in acceleration. If there is friction which works on the body, then the acceleration of the body is ….

A. 1,0 m/s2

B. 1,5 m/s2

C. 2,0 m/s2

D. 2,5 m/s2

8. The following are four example of friction :

1) Friction in car engine

2) Friction in car clutching

3) Air friction on the car when moving

4) Friction in the car brakes to slow down the vehicle

The harmful friction are …

A. (1), (2) and (3)

B. (1) and (4)

C. (2) and (4)

D. (4) only

9. If you pull the block continuously, at a time you will feel that the block is move, at that moment working ….

A. Static friction

B. Kinetic friction

C. Maximum static friction

D. Minimum kinetic friction