Question

A projectile of mass m is fired with velocity v from the point A at an angle of 45*. Neglecting air resistance, the magnitude of change in momentum between the starting point A and arriving point B is

Answer 1

Answer:

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Explanation:

Let u be the initial velocity.

The horizontal component of the velocity does not change during the journey.

The vertical component changes from (vsin45) to (−vsin45).

∣Impulse∣=∣Δ

p

∣=∣

F

⋅Δt∣

Here ΔT=

g

2vsin45

o

=

g

2

v

and ∣

F

∣=mg

∴∣Δ

p

∣=mg×

g

2

v

=

2

mv.

Answer 2

Answer:

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