Question

police van moving on a highway with a speed of 60 km/h fires a bullet at a thief’s car
speeding away in the same direction with a speed of 180km/hr. If the muzzle speed of the
bullet is 120 m/s, with what speed does the bullet hit the thief’s car?[ Note: Obtain the
speed relevant for damaging the thief’s car ].

Answer 1

Answer:

105

Step-by-step explanation:

Speed of the police van, v

p

=30km/h=8.33m/s

Muzzle speed of the bullet, v

b

=150m/s

Speed of the thiefs car, v

t

=192km/h=53.33m/s

Since the bullet is fired from a moving van, its resultant speed can be obtained as:

=150+8.33=158.33m/s

Since both the vehicles are moving in the same direction, the velocity with which the bullet hits the thiefs car can be obtained as:

v

bt

=v

b

−v

t

=158.33−53.33=105m/s