Question

A bullet fired into a fixed target loses half of its velocity after penetrating 3 cm. How much further it will penetrate before coming to rest, assuming that it faces constant resistance to motion ?

(a) 3.0 cm

(b) 2.0 cm

(c) 1.5 cm

(d) 1.0 cm

Answer 1

Correct option (c) 2/√3v

Explanation:

According to work:energy theorem, .
Total work done = Change in kinetic energy

where, F is resistive force and v_o is initial speed.
Case ll Let the further distance travelled by the bullet before coming to rest be s.