Region I

Division of City Schools

DON ALIPIO FERNANDEZ SR. INTEGRATED SCHOOL

Urdaneta City

FIRST PERIODICAL TEST

GRADE X

Name:____________________________________ Date:_____________

KNOWLEDGE

I. Direction: Read each questions carefully. Write the letter of the correct answer on the space provided for you.

____1. Which of the following is not a consequence of a force?

a. change in the mass of a body

b. change in the shape of a body

c. change in the speed of a body

d. change in the direction of motion of a body

____2. Which of the following devices can be used to measure forces?

a. spring balance

b. balance beam

c. triple beam balance

d. all of the above

____3. When an atomic bomb explodes, tremendous amount of energy is released. With what force is this energy associated?

a. weak

b. electric

c. nuclear

d. magnetic

____4.The law of inertia applies to _______________.

a.

b. moving objects

c. objects that are not moving

d. both moving and nonmoving objects

e. All of the above

____5.. If you were in a space ship and fired a cannon ball into frictionless space, the amount of force needed to keep it going would be ________.

a.

b. twice the force with which it was fired

c. the same amount of force with which it was fired

d. one half the force with which it was fired

e. zero, since no force is necessary to keep it moving

____6. Which has more mass, a kilogram of feathers or a kilogram of iron?

a.

b. feathers

c. iron

d. They both have the same mass

e. Cannot be determined from the given information.

____7.The force required to maintain an object at a constant speed in free space is equal to ______.

a.

b. zero

c. the mass of the object

d. the weight of the object

e. the force required to stop it

____8. An object weighs 30 N on earth. A second object weighs 30 N on the moon. Which has greater mass?

a.

b. The one on earth

c. The one on the moon

d. They have the same mass

e. All of the above

____9. Suppose the force of friction on a sliding object is 10N. The force needed for it to maintain a constant velocity is _______________.

a.

b. more than 10 N

c. less than 10 N

d. 10 N

e. All of the above

____10. Compared to its weight on earth, a 10-kg object on the moon will weigh ________.

a.

b. less

c. more

d. the same amount

e. All of the above

____11. An apple weighs 1N. When held at rest above your head, the net force on the apple is______.

a.

b. 0 N

c. 0.1 N

d. 1 N

e. 9.8 N

____12. An apple weighs 1N. The net force on the apple when it is in free fall is _________.

a.

b. 0 N

c. 0.1 N

d. 1 N

e. 9.8 N

____13. When a woman stands with two feet on a scale, the scale reads 500 N. When she lifts one foot, the scale reads _____________.

a.

b. less than 500 N

c. more than 500 N

d. 500 N

e. All of the above

____14. A block is dragged without acceleration in a straight-line path across a level surface by a force of 6 N. What is the frictional force between the block and the surface?

a.

b. less than 6 N

c. 6 N

d. more than 6 N

e. Needs more information to say.

____15. As a 500 N lady sits on the floor, the floor exerts a force on her equal to ______.

a.

b. 1000 N

c. 500 N

d. 250 N

e. 50 N

____16. An unfortunate bug splatters against the windshield of a moving car. Compared to the deceleration of the car on the bug, the deceleration of the bug on the car is _____________.

a.

b. larger

c. smaller

d. the same

e. All of the above

____17. How does the acceleration of an object change in relation to its mass? It is _________.

a.

b. directly proportional

c. inversely proportional

d. acceleration doesn’t depend on mass at all

e. All of the above

____18.In which of the following situations is work being done from a scientist’s perspective?

a.

b. a person sitting on the chair

c. a person walking with a load on its head

d. a person pushing the wall

e. a person lifting a box

____19. Which of these equations gives the amount of work done?

a.

b. Work = F/d

c. Work = Fd

d. Work = Fgd

e. Work = F/t

____20. How much work is done in holding a 1-kg object 2 m above the ground?

a.

b. zero

c. 9.8

d. 2

e. 19.6

____21. How much work was done on an object when a constant force of 20 N pushed it 2 m away?

a.

b. zero

c. 20

a. b, 10

d. 40

____22. What device expends the greatest amount of energy per second?(Use the data below)

Electrical Device Power Rating (W)

Flat iron 1000

Electric fan 75

Television set 70

Fluorescent lamp 20

a.

b. flat iron

c. television set

d. electric fan

e. fluorescent lamp

____23. Which device expends the least?

a.

b. flat iron

c. television set

d. electric fan

e. fluorescent lamp

____24. The power in watts when a 400 N weight is lifted to a height of 6 m in 2 minutes is

a.

b. 10

c. 20

d. 30

e. 40

____25. Which of the following is NOT a unit of power?

a.

b. watt

c. horsepower

d. joule second

e. Newton meter per second

II. Direction: Solve the following problems. Use the space provided for your solution. Use GRESA method.

1. If a 4.5 , a 6.9 , and a 4.2 resistor are connected in series with a 30 V source, the voltage dropped equals _____.

2. In a parallel circuit containing three resistors, R1 = 15 ohms, R2 = 35 ohms and R3 = 45 ohms. What is the total resistance?

1. a. How much power is generated by a 62.25-kg person climbing a 3.25 stair in 7.2 s?

b. Will it be the same for a 60 kg climber if he uses the same amount of time?

c. If a third climber, the twin brother of the second climber, runs up the stairs for 4 s, how much power is generated?

2. A force of 35 N acts upon a 6.5 kg block. Calculate the acceleration of the object.

III. Direction: Draw the electrical symbols being asked.

1. dry cell

2. ground

3. fuse

4. switch

5. resistors

6. connecting wires

7. DC generator

8. capacitor

9. voltmeter

10. load

IV. Direction: List 5 Scientist and write the contribution of the following scientist in the field of radiation

1.

2.

3.

4.

5.

V. Direction: Draw the circuit being told in each statement. Use the space provided for you for your illustration.

1. Three bulbs are connected in a series circuit with four 15 ohms resistor. The circuit is also connected to a 40 V with a closed switch

2. Four bulb with 15 watts each is connected in a parallel circuit with 15 ohms, 20 ohms, 25 ohms and 30 ohms resistors respectively. It is also connected with a fuse and open switch and a ground.