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NEET UG PHYSICS MCQ: MOTION IN A STRAIGHT LINE

1 Hard

1 of 1

Application +4 | -1

A ball dropped from a point

P

crosses a point

Q

in

t

seconds. The time taken by it to travel from Q to R, if

PQ = QR

View answer and explanation

Correct option: D

\left( {\sqrt 2 - 1} \right)t

Option D (

\left( {\sqrt 2 - 1} \right)t

) is correct because it is calculated by using the equations of motion for free fall and solving for the time taken to travel from Q to R.

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Velocity-time curve for a body projected vertically upwards is Two cars A and B approach each other at the same speed, then what will be the velocity of A if velocity of B is

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? Two cars are moving in the same direction with a speed of

30\mathrm{km}{\mathrm{h}^{ - 1}}

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1 \mathrm{~ms}^{-2}

150 \mathrm{~m}

behind it starts from rest with an acceleration of

2 \mathrm{~ms}^{-2}

. After how much time, the car catches up with the scooter? A motor vehicle travelled the first one third of a distance ‘S ’ at a speed of

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, the second one third at a speed of

{V_2} = 20\,kmph

and the last one third at a speed of

{V_3} = 60\,kmph

determine the mean speed of the vehicle over the entire distance ‘S ’