Question

A bomb is dropped from an aeroplane moving horizontally with a speed of 200 m/hr if the air resistance is negligible if the bomb will reach in ground in 5 sec when the altitude of the plane is approximately
a 80ft
b 400ft
c 800ft
d100ft
@kropot72

Answer 1

ye konsi book se prh ri ho?

Answer 2

@CO_oLBoY any idea ?

Answer 3

ya i think height of projectile ka formula lage ga

Answer 4

try to solve it

Answer 5

?

Answer 6

ho jaye ga kr k dekh lo

Answer 7

theta ?

Answer 8

The horizontal motion is irrelevant in this case.

The bomb drops with a vertical acceleration of g

you know that the initial (vertical) velocity is 0
you know that time = 5s

the equation for this is

s=ut + 0.5*a* t^2

so use this equation to solve for s (s is the distance travelld = height of plane)

@sarah786 - Everything you need to answer this is given above - I will not give you the answer

Answer 9

han is tareeqe se aram se ho jaye ga

Answer 10

@MrNood I also dun want direct answers .

Answer 11

but first i have to convert m/hour in m/sec

Answer 12

no
The horizontal velocity is irrelevant. The answer would be the same if the bomb was dropped from a hot air balloon which had 0 velocity.

Answer 13

Oh I got it . I was thinking about a but a = g here . :)

Answer 14

However - you do need to use the correct units for g

g = 9.81 m/s^2 = 32 ft/s^2

Answer 15

oh I dun think about this one .that's why my answer is not coming . :O

Answer 16

its B 400ft

Answer 17

Thank you so much for ur help @MrNood ^_^

Answer 18

np :-)