Question

A bullet is fired horizontaly witha speed of 40 m/s from a height of 50 m . After how much time will the bullet strike the ground .Take g= 10m/s²​

Answer 1

Answer:

The bullet performs a horizontal journey of 100cm with constant velocity of 1500m/s. The bullet also performs a vertical journey of h with zero initial velocity and downward acceleration g

Therefore for horizontal journey, time t=

velocity

Distance

t=

1500

100

=

15

1

sec........(1)

The bullet performs vertical journey for this time

For vertical journey , h=ut+

2

1

gt

2

h=0+

2

1

×10×(

15

1

)

2

h=

2×15×15

10

m=

2×15×15

10×100

cm

h=2.2cm

The gun should be aimed

9

20

cm above the target

Explanation:

hope its help you