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प्रश्न
What is momentum? Write its SI unit. Interpret force in terms of momentum. Represent the following graphically
(a) momentum versus velocity when mass is fixed.
(b) momentum versus mass when velocity is constant.
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उत्तर
Momentum is a property of a moving body by the virtue of both its mass and velocity. It is equal to the product of
mass and velocity. p = m × v
Its SI unit is kg ms−1
As momentum = mass x velocity
(a) When the mass is fixed,
momentum α velocity
(b) When velocity is constant,
momentum α mass
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संबंधित प्रश्न
Write true or false.
A force can change the direction of motion of a moving body.
Fill in the blank.
Friction ....................... the motion.
Select the correct alternative.
Friction
Give one example of slows down motion to indicate that the application of a force?
Give one example of changes the direction of motion to indicate that the application of a force?
State the effect produced by a force in the following case:
A cyclist applies brakes
Name the type of force which act in the following case:
A stone falls from a roof
Name the type of force which act in the following case:
A man rows a boat.
Which offers more friction on a body: a glass surface or a wooden surface?
Solve the following numerical problem.
Two persons are pushing a car with a force of 30 N and 70 N in opposite directions. Calculate the resultant force and its direction.
