ï»¿ A projectile is fired from the surface of the earth with a velocity of 5 m/s and angleÂ Â with the horizontal. Another projectile fired from another planet with a velocity of 3 m/s at the same angle follows a trajectory which is identical with the trajectory of the projectile fired from the earth. The value of the acceleration due to gravity on the planet is, from Physics Motion in A Plane Class 11 Manipur Board

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A projectile is fired from the surface of the earth with a velocity of 5 m/s and angleÂ Â with the horizontal. Another projectile fired from another planet with a velocity of 3 m/s at the same angle follows a trajectory which is identical with the trajectory of the projectile fired from the earth. The value of the acceleration due to gravity on the planet is,

• 3.5

• 5.9

• 16.3

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A.

3.5

If the trajectory is same for both the projectiles, their maximum height will be the same.

That is,

(Hmax)1 = (Hmax)2

i.e.,Â

If the trajectory is same for both the projectiles, their maximum height will be the same.

That is,

(Hmax)1 = (Hmax)2

i.e.,Â

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Give three examples of scalar quantities.

Mass, temperature and energy
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What is a scalar quantity?

A physical quantity that requires only magnitude for its complete specification is called a scalar quantity.
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What is a vector quantity?

A physical quantity that requires direction along with magnitude, for its complete specification is called a vector quantity.
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Give three examples of vector quantities.

Force, impulse and momentum.
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What are the basic characteristics that a quantity must possess so that it may be a vector quantity?

A quantity must possess the direction and must follow the vector axioms. Any quantity that follows the vector axioms are classified as vectors.Â

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