Download App

STD 11 - 4.1. newtons laws of motion — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 4.1. newtons laws of motion4 Marks
MCQ
A bob is hanging over a pulley inside a car through, a string. The second end of the string is in the hand of a person standing in the car. The car is moving with constant acceleration ' $a$ ' directed horizontally as shown in figure. Other end of the string is pulled with constant acceleration ' $a$ ' vertically. The tension in the string is equal to-
  • A
    $m \sqrt{g^2+a^2}$
  • B
    $m \sqrt{ g ^2+ a ^2}- ma$
  • ✓
    $m \sqrt{g^2+a^2}+m a$
  • D
    $m ( g + a )$
✓

Answer

Correct option: C.
$m \sqrt{g^2+a^2}+m a$
c
(c)

Applying Newton's law along string

$\Rightarrow T - m \sqrt{ g ^2+ a ^2}= ma$

$\text { or } T = m \sqrt{ g ^2+ a ^2}+ ma$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The resistance of a galvanometer is $90\, ohms$. If only $10$ percent of the main current may flow through the galvanometer, in which way and of what value, a resistor is to be used
→
A $10\,\mu F$ capacitor is charged to a potential difference of $1000\, V$. The terminals of the charged capacitor are disconnected from the power supply and connected to the terminals of an uncharged $6\, \mu F$ capacitor. What is the final potential difference across each capacitor?......$V$
→
Match the following columns.
Colum $I$ Colum $II$
$(A)$ $\frac{dv}{dt}$ $(p)$ Acceleration
$(B)$ $\frac{d|v|}{dt}$ $(q)$ Magnitude of acceleration
$(C)$ $\frac{dr}{dt}$ $(r)$ Velocity
$(D)$ $\left|\frac{d r }{d t}\right|$ $(s)$ Magnitude of velocity
→
The half life of radioactive Radon is $3.8$ days. The time at the end of which $1/{20^{th}}$ of the Radon sample will remain undecayed is ........... $day$ (Given ${\log _{10}}e = 0.4343$)
→
The given figure represents the phasor diagram of $a$ series $LCR $ circuit connected to an $ac$ source. At the instant $t'$ when the source voltage is given by $V = V_0cos\omega\, t'$, the current in the circuit will be
→
A capacitor of capacitance $500\,\mu F$ is charged completely using a dc supply of $100\,V$. It is now connected to an inductor of inductance $50\,mH$ to form an $LC$ circuit. The maximum current in $LC$ circuit will be $.........A$.
→
The linear mass density $(\lambda)$ of a rod of length $L$ kept along $x$-axis varies as $\lambda=\alpha+\beta x$; where $\alpha$ and $\beta$ are positive constants. The centre of mass of the rod is at ..........
→
In a coil of resistance $10\,\,\Omega$, the induced current developed by changing magnetic flux through it, is shown in figure as a function of time . The magnitude of change in flux through the coil in weber is .......$Wb$
→
${ }_{92}^{238} U$ is known to undergo radioactive decay to form ${ }_{82}^{206} Pb$ by emitting alpha and beta particles. A rock initially contained $68 \times 10^{-6} g$ of ${ }_{92}^{238} U$. If the number of alpha particles that it would emit during its radioactive decay of ${ }_{92}^{238} U$ to ${ }_{82}^{206} Pb$ in three half-lives is $Z \times 10^{18}$, then what is the value of $Z$?
→
if the internal resistance of the battery is $1\, ohm$, then what is the reading of ammeter
→