JEE Main 2026 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 6 April 2026, Shift 2, Physics Q46

Question 46 of 75 in this shift, Physics question 21 of 25, Section B.

A block takes

t

time to slide down a plane inclined at

45^\circ

to the horizontal. If the surface is made smooth (frictionless), the block takes time

\frac{t}{2}

to slide down the plane. The coefficient of friction between the block and the inclined plane is

\left(\frac{\alpha}{100}\right)

. The value of

\alpha

is __________.

Official answer

NTA final key.

Chapter: Laws of Motion
Topic: Friction
Idea tested: Motion Down a Rough Incline

Same idea in other shifts

Asked 4× in all

4 Apr 2026, Shift 1 · Q28The time taken by a block of mass $m$ to slide down from the highest point to the lowest point on a rough inclined plane is $50\ \%$ more…MediumSingle correct
8 Apr 2024, Shift 2 · Q33A given object takes n times the time to slide down $45^\circ$ rough inclined plane as it takes the time to slide down an identical…MediumSingle correct
26 Feb 2021, Shift 2 · Q19An inclined plane making an angle of $30^\circ$ with the horizontal is placed in a uniform horizontal electric field $200\ \frac{N}{C}$ as…HardDiagram basedHas a figure

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.