Question

a police van moving on highway with the speed of 30km/h fire a bullet at the theaf car speeding away in same direction with speed of 120km/h is muzzle speed bullet is 150 ms-1 with what speed bullet hit theaf car​

Answer 1

Answer:

105m/s

Explanation:

Velocity of police v

p

=30km/h=

3

25

m/s

Velocity of thief v

t

=190km/h=

3

160

m/s

Velocity of bullet which police is fire v

b

=150m/s

final velocity of bullet muzzle from gun =v

b

+v

p

=150+

3

25

=

3

475

m/s

Let velocity of thief is Zero and seen with respect to thief. velocity of bullet w.r.t thief

v

b/t

=v

b

−v

t

=

3

475

−

3

160

=

3

315

=105m/s

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Answer 2

Velocity of police vp=30km/h=325m/s

Velocity of police vp=30km/h=325m/sVelocity of thief vt=190km/h=3160m/s

Velocity of police vp=30km/h=325m/sVelocity of thief vt=190km/h=3160m/sVelocity of bullet which police is fire vb=150m/s

Velocity of police vp=30km/h=325m/sVelocity of thief vt=190km/h=3160m/sVelocity of bullet which police is fire vb=150m/sfinal velocity of bullet muzzle from gun =vb+vp=150+325=3475m/s

Velocity of police vp=30km/h=325m/sVelocity of thief vt=190km/h=3160m/sVelocity of bullet which police is fire vb=150m/sfinal velocity of bullet muzzle from gun =vb+vp=150+325=3475m/sLet velocity of thief is Zero and seen with respect to thief. velocity of bullet w.r.t thief 

Velocity of police vp=30km/h=325m/sVelocity of thief vt=190km/h=3160m/sVelocity of bullet which police is fire vb=150m/sfinal velocity of bullet muzzle from gun =vb+vp=150+325=3475m/sLet velocity of thief is Zero and seen with respect to thief. velocity of bullet w.r.t thief vb/t=vb−vt=3475−3160=3315=105m/s.

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