Physicshard · Past Paper
A bullet of mass m hits a target and its velocity becomes half after penetrating a distance x. How much further will it penetrate before coming to rest?
Ax
Bx/2
Cx/3
D2x
✓ Correct Answer: C — x/3
KE change 1 (to v/2) = 3/4 initial KE over distance x. Remaining 1/4 KE will be lost over x/3 distance (since force is constant).
Share this question
More from Physics
- Work done is a maximum when the angle between force and displacement is:
- What is the mass of the Earth?
- An object is placed at the center of curvature of a concave mirror. The position of the image is:
- What is the nature of sound waves in air?
- If the Earth stops rotating, the value of 'g' at the equator will: