MCQ
In the given arrangement, the normal force applied by block on the ground is
- A$m g$
- ✓$m g-F \cos \theta$
- C$m g+F \cos \theta$
- D$F \cos \theta$
✓
Answer
Correct option: B.
$m g-F \cos \theta$
b
(b)
(b)
$N + F \cos \theta=m g$
$N = mg - F \cos \theta$
Hence,option $(B)$ is correct 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
In a historical experiment to determine Planck's constant, a metal surface was irradiated with light of different wavelengths. The emitted photoelectron energies were measured by applying a stopping potential. The relevant data for the wavelength $(\lambda)$ of incident light and the corresponding stopping potential $\left(V_0\right)$ are given below :
→| $\lambda(\mu \mathrm{m})$ | $V_0$ (Volt) |
| $0.3$ | $2.0$ |
| $0.4$ | $1.0$ |
| $0.5$ | $0.4$ |
Given that $c=3 \times 10^8 \mathrm{~m} \mathrm{~s}^{-1}$ and $e=1.6 \times 10^{-19} \mathrm{C}$, Planck's constant (in units of $\mathrm{J}$ s) found from such an experiment is
A vessel is filled with an ideal gas at a pressure of $10$ atmospheres and temperature ${27}^\circ C$. Half of the mass of the gas is removed from the vessel and temperature of the remaining gas is increased to ${87}^\circ C$. Then the pressure of the gas in the vessel will be ...... $atm$
→A particular hydrogen like atom has its ground state binding “energy $122.4\,eV.$ Its is in ground state. Then :
→The focal lengths of the objective and the eye-piece of a compound microscope are $2.0\, cm$ and $3.0 \,cm$ respectively. The distance between the objective and the eye-piece is $15.0 \,cm$. The final image formed by the eye-piece is at infinity. The two lenses are thin. The distances in $cm$ of the object and the image produced by the objective measured from the objective lens are respectively
→A gun is aimed at a target in a line of its barrel. The target is released and allowed to fall under gravity at the same instant the gun is fired. The bullet will
A monoatomic ideal gas of two moles is taken through a cyclic process starting from $1$ as shown. $\frac{{{V_2}}}{{{V_1}}} = 2$ and $\frac{{{V_4}}}{{{V_1}}} = 4$ and temperature iast : $1$ is $T_1 = 27\,^oC$. The temperature at $2$ i.e., $T_2$ ...... $K$
→In case of closed organ pipe which harmonic the $p^{th}$ overtone will be
→In the network shown the potential difference between $A$ and $B$ is ................. $V$ $(R = r_1 = r_2 = r_3 = 1 \Omega$ ,$ E_1 = 3\, V, E_2 = 2\, V, E_3 = 1\, V)$
→Two open organ pipes of length $25 cm$ and $25.5 cm$ produce $10$ beat/sec. The velocity of sound will be ..... $m/s$
→Assertion : Lenz's law violates the principle of conservation of energy.
→Reason : Induced $emf$ always opposes the change in magnetic flux responsible for its production.