Internal Force
Trending Questions
Q. A solid cylinder length is suspended symmetrically through two massless strings, as shown in the figure. The distance from the initial rest position, the cylinder should be unbinding the strings to achieve a speed of 4 m/s, is cm. (Take g=10m/s2).
Q. Two bodies in space start moving towards each other, due to the gravitational force between them. Which of the following is true for these two bodies, assuming there are no other forces acting on them?
- The total energy is constant throughout this process
- Energy is maximum when the distance between them is maximum
- Internal energy decreases with time
- The total kinetic energy increases with time
Q. Two bodies in space start moving towards each other, due to the gravitational force between them. Which of the following is true for these two bodies, assuming there are no other forces acting on them?
- The total energy is constant throughout this process
- Energy is maximum when the distance between them is maximum
- Internal energy decreases with time
- The total kinetic energy increases with time
Q. A shell at rest on a smooth horizontal surface explodes into two fragments of masses m1 and m2. If just after explosion m1 move with speed u, then work done by internal forces during explosion is
- 12(m1+m2)m2m1u2
- 12(m2+m1)u2
- 12m1u2(1+m1m2)
- 12(m2−m1)u2
Q. A shell at rest on a smooth horizontal surface explodes into two fragments of masses m1 and m2. If just after explosion m1 move with speed u, then work done by internal forces during explosion is
- 12(m1+m2)m2m1u2
- 12(m2+m1)u2
- 12m1u2(1+m1m2)
- 12(m2−m1)u2