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Class 10 Class 12
A body is projected with velocity u at angle θ with vertical. At what height will it strike the wall, r distance away from the point of projection?

Consider a body which is projected from O in XY plane with velocity 'u' at angle θ with vertical, and
The body is projected at an angle α = 90°–θ with the horizontal.

Let the body strike the wall at height h.

So, co-ordinates of point P where the projectile hits the wall are ↔ (r,h).

Equation of trajectory is given by,

[∵

Since  lies on trajectory,

∴

is the height at which the body will strike the wall.

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Give three examples of vector quantities.

Force, impulse and momentum.
865 Views

What is a vector quantity?

A physical quantity that requires direction along with magnitude, for its complete specification is called a vector quantity.
835 Views

Give three examples of scalar quantities.

Mass, temperature and energy
769 Views

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.

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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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