Download App

Newton's Laws of Motion — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsNewton's Laws of Motion1 Mark
MCQ
A force vector applied on a mass is represented as $\vec{F}=6 \hat{i}-8 \hat{j}+10 \hat{k}$ and accelerates with $1 \ m / s ^2$. What will be the mass of the body
  • ✓
    $10 \sqrt{2} \ kg$
  • B
    $5\ kg$
  • C
    $10\  kg$
  • D
    $20 \ kg$
✓

Answer

Correct option: A.
$10 \sqrt{2} \ kg$
(a) $m=\frac{F}{a}=\frac{\sqrt{6^2+8^2+10^2}}{1}=\sqrt{200}=10 \sqrt{2} \mathrm{~kg}$

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

More "MCQ" from Newton's Laws of Motion→Newton's Laws of Motion — all question types→JEE physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

A body of mass $m$ collides against a wall with a velocity $v$ and rebounds with the same speed. lts change of momentum is
→
The focal lengths of the objective and eye-lens of a microscope are 1 $\mathrm{cm}$ and $5 \mathrm{~cm}$ respectively. If the magnifying power for the relaxed eye is $45,$ then the length of the tube is
→
A simple harmonic oscillator has a period of $0.01 sec$ and an amplitude of $0.2 m$. The magnitude of the velocity in $m sec ^{-1}$ at the centre of oscillation is [JIPMER 1997]
→
The radiation emitted by a star $A$ is 10,000 times that of the sun. If the surface temperatures of the sun and the star $A$ are $6000 K$ and $2000 K$ respectively, the ratio of the radii of the star $A$ and the sun is
→
Who among the following scientists made the statement -"Chemical change can produce electricity"
→
A $1\  \mu \mathrm{A}$ beam of protons with a cross-sectional area of $0.5 \ \mathrm{sq} . \mathrm{mm}$ is moving with a velocity of $3 \times 10^4 \mathrm{~ms}^{-1}$. Then charge density of beam is
→
Due to Doppler's effect, the shift in wavelength observed is $0.1 \mathring A$ for a star producing wavelength $6000 \mathring A$. Velocity of recession of the star will be
→
Polarised glass is used in sun glasses because
→
A particle in S.H.M. is described by the displacement function $x(t)=a \cos (\omega t+\theta)$. If the initial $(t=0)$ position of the particle is $1 cm$ and its initial velocity is $\pi cm / s$. The angular frequency of the particle is $\pi rad / s$, then it's amplitude is
→
A car of mass ' $m$ ' is driven with acceleration ' $a$ ' along a straight level road against a constant external resistive force ' $R$. When the velocity of the car is ' $V$, the rate at which the engine of the car is doing work will be
→