NEET Physics MCQ: NCERT Motion in a Straight Line

🔄Ncert Concepts :kinematics, uniform acceleration, distance calculation

Related Questions

A particle moves along a semicircular path of radius $R$ in time $T$ . If it returns to its starting point along the diameter in time $T/2$ , what is the magnitude of the average velocity for the entire journey?

$2R/T$

$4R/(3T)$

$2\pi R/(3T)$

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🎯Difficulty :Hard

🔄Ncert Concepts :Average Velocity, Displacement, Circular Motion

A body covers one-third of its journey with speed 'u', the next one-third with speed 'v', and the last one-third with speed 'w'. What is its average speed for the entire journey?

(u + v + w)/3

3uvw/(uv + vw + wu)

uvw/(u + v + w)

(u + v + w)

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🔄Ncert Concepts :Average Speed, Distance, Time

Two boys are standing at the ends A and B of a ground where AB=a. The boy at B starts running in a direction perpendicular to AB with velocity ${v_1}$ . The boy at A starts running simultaneously with velocity v and catches the other boy in a time t, when t is

$\frac{a}{{\sqrt {\left( {{v^2} + v_1^2} \right)} }}$

$\sqrt {{a^2}\;/\;\left( {{v^2} - v_1^2} \right)}$

$a\;/\;\left( {v - {v_1}} \right)$

$a\;/\;\left( {v\; + {v_1}} \right)$

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🎓 Ncert Level:Analyzing

🔄Ncert Concepts :relative velocity, pythagorean theorem, kinematics

The motion of a particle is described by the equation $x = a + b{t^2}$ , where a=15 cm and b=3 $cm/{s^2}$ Its instantaneous velocity at time 3 sec will be

36 cm/sec

18 cm/sec

16 cm/sec

32 cm/sec

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🔄Ncert Concepts :Kinematics, Instantaneous Velocity, Differentiation

An object moves with a constant speed in a circular path. Is its velocity constant?

Yes

Depends on the radius

Depends on the speed

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🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :velocity, speed, circular motion

The co-ordinates of a moving particle at time t are given by $x = c{t^2}\,\,and\,\,y = b{t^2}.$ The instantaneous speed of the particle is

$2t\left( {b + c} \right)$

$2t{\left( {b + c} \right)^{1/2}}$

$2t\left( {{c^2} - {b^2}} \right)$

$2t{\left( {{c^2} + {b^2}} \right)^{1/2}}$

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🔄Ncert Concepts :kinematics, differentiation, speed, vector magnitude

A boat travels a distance $d$ downstream with speed $3v$ and returns upstream the same distance with speed $v$ . Find its average speed for the entire journey.

(3v)/4

(3v)/2

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PYQ YEAR: 2023

🔄Ncert Concepts :average speed, relative velocity

A body has speed of V,2V and 3V in first 1/3 of distance S, seconds 1/3 of S and third 1/3 of S respectively. Its average speed will be

$v$

$2v$

$\frac{{18}}{{11}}v$

$\frac{{11}}{{18}}v$

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