Gamma Question Bank for Medical Physics>Chapter 4 - Motion in a Plane>Assignment>Q 1

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Which of the following is correct about unit vectors?

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Important Questions on Motion in a Plane

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Gamma Question Bank for Medical Physics>Chapter 4 - Motion in a Plane>Assignment>Q 2

A vector of magnitude

5

units directed along

+ z -

axis can be represented as

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Gamma Question Bank for Medical Physics>Chapter 4 - Motion in a Plane>Assignment>Q 3

Which of the following is a scalar quantity?

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Gamma Question Bank for Medical Physics>Chapter 4 - Motion in a Plane>Assignment>Q 4

The

y -

component of a velocity is

v m s^{- 1}

and

x -

component of velocity is

\sqrt{3} vm s^{- 1}

. The direction of the body with the

y -

axis at this instant is

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Gamma Question Bank for Medical Physics>Chapter 4 - Motion in a Plane>Assignment>Q 5

A particle of mass

3 kg

starts from rest and accelerates with constant acceleration

\vec{a} = (\hat{i} - 3 \hat{j}) m s^{- 2}

, then velocity at

t = 2 s

is

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Gamma Question Bank for Medical Physics>Chapter 4 - Motion in a Plane>Assignment>Q 6

A particle starts from origin moving with velocity

\vec{v} = (3 t^{2} \hat{i} + 4 t \hat{j}) m s^{- 1}

, where

t

is time in second, then position

(\vec{r})

of particle as function of

t

is

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Gamma Question Bank for Medical Physics>Chapter 4 - Motion in a Plane>Assignment>Q 7

The velocity of particle is given by

\vec{v} = (3 \hat{i} + 6 t \hat{j}) m s^{- 1}

, where

t

is time in second, the equation of trajectory of particle is [Assume, particle starts from origin]

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Gamma Question Bank for Medical Physics>Chapter 4 - Motion in a Plane>Assignment>Q 8

If a body is thrown from the tower of height

(h)

with horizontal velocity

v

then which of the following is independent of initial velocity

v

?

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Gamma Question Bank for Medical Physics>Chapter 4 - Motion in a Plane>Assignment>Q 9

A man can swim with speed

5 m s^{- 1}

. He wants to cross a

100 m

wide river flowing at

3 m s^{- 1}

to reach the point directly opposite to his starting point, in which direction he should try to swim?