MCQ
A ball is dropped from height $10 \,m$. Ball is embedded in sand $1 \,m$ and stops, then
- ✓Only momentum remains conserved
- BOnly kinetic energy remains conserved
- CBoth momentum and K.E. are conserved
- DNeither K.E. nor momentum is conserved
✓
Answer
Correct option: A.
Only momentum remains conserved
a
(a)Momentum of earth-ball system remains conserved.
(a)Momentum of earth-ball system remains conserved.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A particle of mass m is hanging vertically by an ideal spring of force constant K. If the mass is made to oscillate vertically, its total energy is
A cylindrical jar of cross-sectional area $0.01 m^2$ is filled with water to a height of 50 cm . It carries a tight-fitting piston of negligible mass. What is the pressure at the bottom of the jar when the mass of 1 kg is placed on the piston? Take $g =10 ms^{-2}$.
→A thin rod of length $L$ and mass $M$ is bent at the middle point $O$ at an angle of ${60^o}$ as shown in figure. The moment of inertia of the rod about an axis passing through $O$ and perpendicular to the plane of the rod will be
→A particle is rotated in a vertical circle by connecting it to a string of length l and keeping the other end of the string fixed. The minimum speed of the particle when the string is horizontal for which the particle will complete the circle is:
The maximum value of $F$ which can be applied on the system shown in figure so that both blocks move together with same acceleration is ..........
→The graph is drawn between the applied force $F$ and the strain $(x)$ for a thin uniform wire. The wire behaves as a liquid in the part
→The dimensions of permittivity ${\varepsilon _0}$ are
→Two particles start simultaneously from the same point and move along two straight lines, one with uniform velocity $v$ and other with a uniform acceleration $a.$ If $\alpha$ is the angle between the lines of motion of two particles then the least value of relative velocity will be at time given by
→Three conducting rods of same material and cross section are shown in figure. Temperature at $A,D$ and $C$ are maintained at $20\ ^oC, 90\ ^oC$ and $0\ ^oC$. The ratio of lengths of $BD$ and $BC$ if there is no heat. Flows in $AB$ is
→The length and breadth of a metal sheet are $3.124\,m$ and $3.002\,m$ then area of sheet is
→