MCQ
With what minimum acceleration can a fireman slide down a rope while breaking strength of the rope is $\frac{2}{3}$ of his weight?
- Ag
- B$\frac{2}{3} g$
- C$\frac{1}{3} g$
- Dzero
✓
Answer
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 is moving at a speed of $10 m / s$ in a circular motion. The radius of the path is $2 m$ and mass of the particle is $2 kg$. The centripetal force of the particle is
→0.00849 contains ___________ significant figures.
The ability of a material to resist fracturing when a force is applied to it, is called……………
The time period of a geostationary satellite is $24 h,$ at a height $6R_E (R_E$ is radius of Earth$)$ from surface of Earth. The time period of another satellite whose height is $2.5 R_E$ from surface will be,
→Two particles of masses $m _1, m_2$ move with initial velocities $u _1$ and $u _2$. On collision, one of the particles get excited to higher level, after absorbing energy $\varepsilon$. If final velocities of particles be $v_1$ and $v_2$ then we must have
→Two particles of masses $m _1$ and $m _2$ have equal kinetic energies. The ratio their momenta is
→Three masses m, 2m and 3m are attached with light string passing over a fixed frictionless pulley as shown in the figure. The tension in the string between 2m and 3m is (g is acceleration due to gravity)
Space wave travels through …………………
The unit of moment of force is same as _______________ .
Two trains, which are moving along different tracks in opposite direction, are put on the same track by mistake. On noticing the mistake, when the trains are 300 m apart the drivers start slowing down the trains. The graphs given below show decrease in their velocities as function of time. The separation between the trains when both have stopped is
