Physicshard · Past Paper
A bullet fired into a fixed target loses half of its velocity after penetrating 3 cm. How much further will it penetrate before coming to rest?
A1 cm
B1.5 cm
C2 cm
D3 cm
✓ Correct Answer: A — 1 cm
v^2 = u^2 + 2as. (u/2)^2 = u^2 + 2a(3). Find 'a'. Then 0 = (u/2)^2 + 2a(x). x = 1 cm.
Share this question
More from Physics
- If the speed of light in medium A is 2x10^8 m/s and in medium B is 2.5x10^8 m/s, the refractive index of A with respect to B is:
- A lens of power +5 D is submerged in a liquid of refractive index equal to that of the lens material. Its power becomes:
- The angle between the incident ray and the reflected ray is 80 degrees. What is the angle of incidence?
- The area under a velocity-time graph represents:
- The refractive index of a material depends on: