Physics
Grade-9
Easy
Question
Which of these will have less frictional force?
- Submarine moving in water with a speed of 10Km/h
- Submarine moving in water with a speed of 20km/h
- Submarine moving in the water with a speed of 30 Km/h
- Submarine moving in the water with a speed of 40Km/h
Hint:
The friction is less when the object moves at less speed in the water.
The correct answer is: Submarine moving in water with a speed of 10Km/h
The submarine moving in water with a speed of 10Km/h has less friction.
- A submarine with a motion in water causes liquid/fluid friction.
- The liquid friction force depends on the speed of the object moving in the liquid.
- The submarine that moves at 10Km/h creates a less friction than that moves at the speed of 20 Km/h,30Km/h, and 40Km/h.
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