Question

Truck moving with speed of 15m/s A car chasing this truck with a speed of 10m/s fires a bullet at truck with muzzle velocity 90km/h the speed with which the bullet hit the truck is

Answer 1

Answer: 72 km/hr

Solution:

speed of truck=15 m/s

speed of car=10m/s

speed of bullet= 90 km/h x 5/18=25m/s

speed of the bullet with respect to a stationary point on ground

= (speed of car+ speed of bullet)-speed of truck

=10+25-15=20 m/s

or 20m/sx 18/5

=》 72 km/h