# 8th Class Science Force and Pressure Question Bank

### done Force and Pressure

• A) Kicking

B) Lifting

C) Picking

D) Opening

• A) Muscular

B) Magnetic

C) Chemical

D) Electric

• A) The speed of the object will increase.

B) The speed of the object will decrease.

C) The speed of the object will remain unchanged.

D) The object comes to rest.

• A) The body changes shape.

B) The body moves with increased speed.

C) The body remains at rest.

D) The body breaks up.

• A) A ball being kicked

B) A fan switched on

C) A man jumping from a height

D) Repeatedly tearing of a paper

• A) Change in the shape of an object

B) Change in the direction of the motion of an object

C) Slowing down of a moving object

D) Acceleration in a moving body

• A) Muscular force

B) Electrostatic force

C) Elastic spring force

D) Frictional force

• A) The sky above our head

B) The air surrounding the earth

C) The gravitational force of the sun and other planets

D) The mass of the earth

• A) Increases with depth

B) Decreases with depth

C) Remains constant

D) First increases and then decreases

• A) Force$\times$area

B) Force/area

C) Pressure

D) Pressure$\times$area

• A) When no force is acting on it.

B) When the net force acting on the body is zero

C) When there is a gravitational pull.

D) When there is friction between the body and the water

• A) A kite held stationary in the sky.

B) A ball falling freely from a height.

C) A helicopter hovering above the ground.

D) A cork floating on the surface of water.

• A) The volume of liquid

B) The atmospheric pressure

C) The gravitational pull

D) All of the above

• A) Change of state

B) Change of shape

C) Change of size

D) Change of chemical composition

•  (i) difference in pressure. (ii) gravitational force. (iii) decrease of friction m pipes.

A) Only (i)

B) Only (i) and (ii)

C) Only (ii) and (iii)

D) (i), (ii) and (iii)

• A) Lack of oxygen

B) Decrease in atmospheric pressure

C) Increase in water pressure

D) All of the above

• A) Liquid pressure

B) Thrust

C) Atmospheric pressure

D) Air temperature

• A) Forces are similar acting in the same direction.

B) Forces are parallel and opposite.

C) Forces add up to zero when taken as vectors.

D) Forces are different acting in the same direction.

• A) To maintain their body temperature in cold sea water

B) To protect against sea animals

C) To counter balance the pressure in the sea.

D) To keep them dry

• A) Distance between two bodies

B) Mass of the two bodies

C) Chemical composition of the two bodies

D) All of the above

• A) It is the inherent property of rubber.

B) Gravitational force acts on it.

C) Elastic spring force acts on it.

D) Atmospheric pressure acts on it.

• A) Muscular force

B) Magnetic force

C) Gravitational force

D) All of the above

• A) Stops the moving bowling ball

B) Changes the direction of the moving bowling ball

C) Changes the shape of the moving bowling ball

D) Changes the position of the stationary pins

• A) Throwing a stone

B) Grabbing hold of a pencil

C) Leaves falling from a tree

D) A load lifted by a pulley

• A) Wide tyres of a heavy vehicle

B) Cutting of an apple with a sharp knife

C) Hammering of a nail into wood

D) All of the above

• A) Rowing of a boat

B) Bursting of a balloon filled with lots of air.

C) Pedalling a cycle

D) Catching a moving cricket ball

• A) He is applying force on the stool.

B) He represents only magnitude but no direction.

C) He is not applying any force on the stool.

D) The gravitational pull of earth on the stool is greater.

• A) The moon orbits the earth keeping the same side facing us.

B) The gravitational pull of the moon causes high tides in oceans.

C) The craters on the moon caused long ago still exist because the moon has no atmosphere.

D) The sun lights up the complete moon at any one time.

• A) No force acts on it.

B) There is friction between the book and the surface of the table.

C) Force exerted by the book on the table is the same as the force exerted by the table on the book.

D) All of the above

• A) It is less than his actual weight.

B) It is more than his actual weight.

C) It is the same as his actual weight.

D) It is zero.

• A) It is small in magnitude.

B) It acts only-on atmosphere and not on us.

C) Our internal body pressure is equal to that of the atmospheric pressure.

D) It does not act at sea level.

• A) No force acts on the falling body.

B) The falling body is very light.

C) Air exerts a frictional force on the falling body.

D) The force acting on the body is in the direction of the fall.

• A) Pressure

B) Volume

C) Weight

D) Mass

• A) (i), (ii), (iii)

B) (ii), (iii), (i)

C) (ii), (i), (iii)

D) (iii), (ii), (i)