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- Q1
Friction is present in our everyday lives. Which of the following situations involves friction?
Diver falling in the pool.
Dropping water on the faucet.
Falling debris in a construction site.
Rolling ball in a smooth surface.
30sS6FE-IIIa-c-1 - Q2
Friction can be seen everywhere. Which of the following statements is true about friction?
It acts on the same direction.
It only exists when there is motion.
It is the same as kinetic friction.
It always opposes motion.
30sS6FE-IIIa-c-1 - Q3
A book on top of the table shows static friction. What do you think is static friction?
It is the strongest friction that keeps the book in motion.
It is the least friction that keeps the book in motion.
It is the strongest friction that keeps the book motionless.
It is the least friction that keeps the book motionless.
30sS6FE-IIIa-c-1 - Q4
Rubbing your hands show frictional force. What do you create when you rub your hands?
volume
mass
gravity
heat
30sS6FE-IIIa-c-1 - Q5
It will be difficult if there is no friction. Which of the following sentences best describes frictional force?
It occurs when two surfaces do not touch against each other.
It occurs on one surface.
It occurs when two surfaces touch against each other.
It only occurs between solid surfaces and liquid surfaces.
30sS6FE-IIIa-c-1 - Q6
A child accidentally slides on a wet floor. What causes the child to slide on the floor?
air resistance
friction
volume
gravity
30sS6FE-IIIa-c-1 - Q7
The effect of friction can be desirable or undesirable. Which of the following shows undesirable effects of friction?
It reduces speed of a moving vehicle.
It allows you to grip things.
It converts energy to heat and noise.
It helps in converting one form of motion into another.
30sS6FE-IIIa-c-1 - Q8
Force is a push or pull that acts on an object. Which of the following is a force that opposes motion?
gravity
friction
mass
acceleration
30sS6FE-IIIa-c-1 - Q9
Friction plays an important role in your life. Which of the following statements is true?
It does not affect the motion of an object.
It is only present if gravity is also present.
It slows down or stops objects in motion.
It pulls all objects towards the center of the Earth.
30sS6FE-IIIa-c-1 - Q10
To increase machine effectiveness, you apply lubricants. Which of the following cannot be used as lubricant?
grease
wax
oil
alcohol
30sS6FE-IIIa-c-1