Download App

Friction Science - Friction

Gujarat Board (GSEB) - STD 8 - Science (GSEB - English Medium). 120 questions in this chapter.

Question types

Friction question types

120 questions across 7 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

120
Questions
7
Question groups
5
Question types
Sample Questions

Friction questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q. [I MARKS]1 Mark
Which of the following statements is incorrect?
  • A
    Friction acts on a ball rolling along the ground.
  • B
    Friction acts on a boat moving on water.
  • C
    Friction acts on a bicycle moving on a smooth road.
  • ✓
    Friction does not act on a ball moving through air.

Answer: D.

View full solution →
Q 3M.C.Q. [I MARKS]1 Mark
A boy rolls a rubber ball on a wooden surface. The ball travels a short distance before coming to rest. To make the same, ball travel longer distance before coming to rest, he may
  • A
    spread a carpet on the wooden surface
  • B
    cover the ball with a piece of cloth
  • ✓
    sprinkle talcum powder on the wooden surface
  • D
    sprinkle sand on the wooden surface

Answer: C.

View full solution →
Q 4M.C.Q. [I MARKS]1 Mark
To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?
  • ✓
    Stone
  • B
    Plastic block
  • C
    Wooden block
  • D
    Glass block

Answer: A.

View full solution →
Q 5M.C.Q. [I MARKS]1 Mark
In figure, a boy is shown pushing the box from right to left.
Image
The force of friction will act on the box
  • A
    from right to left $(\leftarrow)$
  • ✓
    from left to right (→)
  • C
    vertically downwards ( $(\downarrow)$
  • D
    vertically upwards ( $\uparrow$ )

Answer: B.

View full solution →
Q 13questions in short. [2 marks ]2 Marks
A marble is allowed to roll down an inclined plane from a fixed height. At the foot of the inclined plane, it moves on a horizontal surface (a) covered with silk cloth, (b) covered with a layer of sand and (c) covered with a glass sheet. On which surface, will the marble move the shortest distance. Give reason for your answer.
View full solution →
Q 14questions in short. [2 marks ]2 Marks
A father and son pushed their car to the side of road as it had stalled in the middle of the road. They experienced that although they had to push with all their might initially to move the car, the push required to keep the car rolling was smaller, once the car started rolling. Explain.
View full solution →
Q 22questions in short. [3 marks ]3 Marks
The frictional force between two moving surfaces which are in contact with each other is called kinetic friction or sliding friction.
Example If a boy apply some pushing force on the box, the box will start sliding on the surface and the friction between the surfaces is called sliding friction.
The force required to keep a body in motion is less than the force required to start the motion, so we can say that sliding friction is less than the static friction.
Image
(i) Explain why the sliding friction is always greater than rolling friction?
(ii) Mention two different examples for sliding friction.
View full solution →
Q 23questions in short. [3 marks ]3 Marks
In Physics classroom, a teacher told to his students that when a cricket player want to catch a ball then first he rub the hands. Thus, there is less chance of slipping the ball from hands.
(a) Explain the reason of not slipping of ball from hand.
(b) If the player makes his hands oily instead of rubbing them, would he be able to catch the ball?
(c) Mention the type of teaching skills of teacher is being represented here.
View full solution →
Q 24questions in short. [3 marks ]3 Marks

Sonakshi investigated how a pencil cell travels on a ramp when the table is covered with different surfaces (wood, cotton cloth and silk cloth). She noted the time taken by the pencil cell to travel on each surface three times. Her results are mentioned below.

Surface

Time (s)

Time (s)

Time (s)

Wooden

5.01

4.99

5.21

Cotton cloth

7.02

7.25

7.20

Silk cloth

4.20

4.20

4.25

Q.1. Name the two factors on which the magnitude of a frictional force depends.
Q.2. From the chart given above, state which travelled fastest and find the average time it took.
Q.3. Explain with one example how friction can be both a positive and a negative part in our everyday life?

View full solution →
Q 31Match the Following.4 Marks
Column IColumn II
(a) Friction produces(i) Ceiling fan
(b) Lubricants(li) Heat
(c) Soapy floor(iii) Oil and grease
(d) Ball bearing(iv) Rolling friction
(v) Less friction
View full solution →
Browse all question groups ↑

Generate a Friction paper free

Pick question groups from the list above, set marks and difficulty, and export a branded PDF with step-by-step answer keys. First 3 chapters free — no signup.

Download App
Generate Paper FreeAll Science chapters