Force of Friction
Force of Friction: Overview
This topic explains that if a force is applied along the left, friction acts along the right direction. If force is applied along the right, friction acts along the left direction. The force of friction always opposes the applied force. Let us learn it in detail here.
Important Questions on Force of Friction
The students of class IV were very excited. They had moved into a brand-new classroom. The walls were clean and the floor was smooth and glossy. During break time, students started running around the class. Reva asked her friend, Dia, not to run as the floor was slippery. But Dia ran, slipped, fell, and hurt her foot. What would have you done if you were in Dia's place?
The students of class IV were very excited. They had moved into a brand-new classroom. The walls were clean and the floor was smooth and glossy. During break time, students started running around the class. Reva asked her friend, Dia, not to run as the floor was slippery. But Dia ran, slipped, fell, and hurt her foot.
Why do think Dia slipped?
Unscramble the following word to make a meaningful word:
TRFICINO.
What type of friction is observed during the movement of a train on the rail tracks?
In which of the given situation, a frictional force will occur between two surfaces?
A big box is being pushed from right to left in the picture given below.
What will be the direction of frictional force?
The frictional force exerted by fluids is also called as _____ .
If we apply oil on the door hinges, the friction will
Which of the following activities happen due to the force of friction?
Friction is the only reason for the loss of energy.
A moving body comes to rest due to friction alone.
_____ (Frictional/ Magnetic/ Elastic) force is the force that opposes motion.
Which force always opposes the relative motion between the bodies in contact? (Muscular force/Frictional force)
Choose the right word from the given options:
_____ (Friction / Gravitation) is caused when two objects rub against each other.
Step 1: Cut one butterfly of the card paper. Cut the straw into two pieces. Fix them with the help of the adhesive tape at an angle on each of the wing of the butterfly as shown.
Step 2: Take a long length of a string that you can loop over a hook in the wall or a curtain rod. Pass the free ends of the thread through both the straw pieces and tie it up as shown so that when loose, the butterfly does not slip out.
Step 3: Hold both the ends of the string and pull alternately.
What will happen if the straw is kept parallel to one another instead of at an angle? Find out.
Step:1 Cut one butterfly of the card paper. Cut the straw into two pieces. Fix them with the help of the adhesive tape at an angle on each of the wing of the butterfly as shown.
Step:2 Take a long length of a string that you can loop over a hook in the wall or a curtain rod. Pass the free ends of the thread through both the straw pieces and tie it up as shown so that when loose, the butterfly does not slip out.
Step: 3 Hold both the ends of the string and pull alternately.
What happens when you pull the strings?
Can you name the type of force acting on the following?
(Choose the force which you think is appropriate: Tension Force, Spring Force, Frictional force).
