An automobile of mass |Work, Energy and Power| JEE MAIN 2021

Competishun Header

JEE MAIN 2021

27-07-2021 - S2

Question

An automobile of mass ‘m’ accelerates starting from origin and initially at rest, while the engine supplies constant power P. The position is given as a function of time by :

Select the correct option:

A

$\left(\frac{9 P}{8 m}\right)^{\frac{1}{2}} t^{\frac{3}{2}}$

B

$\left(\frac{8 P}{9 m}\right)^{\frac{1}{2}} t^{\frac{2}{3}}$

C

$\left(\frac{9 m}{8 P}\right)^{\frac{1}{2}} t^{\frac{3}{2}}$

D

$\left(\frac{8 P}{9 m}\right)^{\frac{1}{2}} t^{\frac{3}{2}}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Question Tags

JEE Main

Physics

Hard

Start Preparing for JEE with Competishun

Video Solution

BY competishun

Watch Solution

YouTube

Filters 0

Showing 18 questions

QJEE Main 20242024

An amine ( X ) is prepared by ammonolysis of benzyl chloride. On adding p-toluenesulphonyl chloride to it the solution...

JEE MainChemistryEasy

View Solution→

QJEE Main 20242024

The correct IUPAC name of $\left[\mathrm{PtBr}_2\left(\mathrm{PMe}_3\right)_2\right]$ is:

JEE MainChemistryEasy

View Solution→

QJEE Main 20242024

Evaluate the following statements related to group 14 elements for their correctness
(A) Covalent radius decreases down the group...

JEE MainChemistryEasy

View Solution→

QJEE Main 20242024

The correct statements among the following, for a "chromatography" purification method is:

JEE MainChemistryEasy

View Solution→

QJEE Main 20242024

The number of ions from the following that are expected to behave as oxidising agent is:
$...

JEE MainChemistryEasy

View Solution→

QJEE Main 20242024

Given below are two statements:
Statement I: $\mathrm{PF}_5$ and $\mathrm{BrF}_5$ both exhibit $\mathrm{sp}^3 \mathrm{~d}$ hybridisation.
Statement II: Both...

JEE MainChemistryEasy

View Solution→

QJEE Main 20242024

The incorrect statement regarding the geometrical isomers of 2-butene is:

JEE MainChemistryEasy

View Solution→

QJEE Main 20242024

Arrange the following elements in the increasing order of number of unpaired electrons in it.
(A) Sc (B) Cr...

JEE MainChemistryEasy

View Solution→

QJEE Main 20242024

How can an electrochemical cell be converted into an electrolytic cell ?

JEE MainChemistryEasy

View Solution→

QJEE Main 20242024

During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty...

JEE MainChemistryEasy

View Solution→

QJEE Main 20242024

The incorrect statements regarding enzymes are:
(A) Enzymes are biocatalysts.
(B) Enzymes are non-specific and can catalyse different...

JEE MainChemistryEasy

View Solution→

QJEE Main 20242024

Molality (m) of 3 M aqueous solution of NaCl is: (Given : Density of solution $=1.25 \mathrm{~g} \mathrm{~mL}^{-1}$, Molar mass...

JEE MainChemistryEasy

View Solution→

QJEE Main 20242024

Two open organ pipes of length 60 cm and 90 cm resonate at $6^{\text {th }}$ and $5^{\text {th }}$...

JEE MainPhysicsEasy

View Solution→

QJEE Main 20242024

Two coherent monochromatic light beams of intensities I and 4I are superimposed. The difference between maximum and minimum possible intensities...

JEE MainPhysicsEasy

View Solution→

QJEE Main 20242024

A wire of cross sectional area A, modulus of elasticity $2 \times 10^{11} \mathrm{Nm}^{-2}$ and length 2 m is stretched...

JEE MainPhysicsEasy

View Solution→

QJEE Main 20242024

In the given figure an ammeter A consists of a $240 \Omega$ coil connected in parallel to a $10 \Omega$...

JEE MainPhysicsEasy

View Solution→

QJEE Main 20242024

A coil having 100 turns, area of $5 \times 10^{-3} \mathrm{~m}^2$, carrying current of 1 mA is placed in uniform...

JEE MainPhysicsEasy

View Solution→

QJEE Main 20242024

Three balls of masses $2 \mathrm{~kg}, 4 \mathrm{~kg}$ and 6 kg respectively are arranged at centre of the edges of...

JEE MainPhysicsEasy

View Solution→