Question

In: Physics

Which of the following quantities are constant for a projectile during it's flight? Select all that...

Which of the following quantities are constant for a projectile during it's flight?

Select all that are True.

a.y

b.v

c. v_x

d. x

e. r

f. a_y

g. v_y

h. a_x

Expert Solution

Only H part will remain constant during its flight, i.e., So Answer = h

A) Y :-y will change because accleration due to gravity will be in y direction

B) V :-V will change because of acclerated motion.

C) VX:- V = V_xi + V_yj And accleration will be in Y direction so and if angle of projection is Θ then

Vx = VcosΘ i Vy = VsinΘ - A*T j where A = accleration due to gravity and T is Time

X = Vx*T =VcosΘ*T i

So V.X = V²cos²Θ*T Which is not constant

D) X :- As discussed in previous part X = VcosΘ*T which will change with time

E) R :- This changes continously because projectile motion are parabolic in nature.

F) AY:- A = -g j and Y = VsinΘ - g*T²/2

So AY = -VgsinΘ + g²T²/2 Which will change with respect to time

G) VY :- V = V_xi + V_y j and Y = VsinΘ - g*T²/2 j

VY = (VsinΘ)² - VsinΘ*g*T²/2 which is not constant with respect to time

H) AX :- A = -g j and X = VcosΘ*T i

So AX = 0 which is constant

genius_generous answered 1 hour ago

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