Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Analytical Questions)>Q 12

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The speed of a projectile at its maximum height is half of its initial speed. The angle of projection is

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Important Questions on Kinematics

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Analytical Questions)>Q 13

A boy standing at the top of a tower of

20 m

height drops a stone. Assuming

g = 10 m s^{- 2}

, the velocity with which it hits the ground is:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Analytical Questions)>Q 14

A body is moving with velocity

30 m s^{- 1}

towards the east. After

10 seconds

its velocity becomes

40 m s^{- 1}

towards the north. The average acceleration of the body is

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Analytical Questions)>Q 15

A missile is fired for maximum range with an initial velocity of

20 m s^{- 1}

. If

g = 10 m s^{- 2}

, the range of the missile is:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Analytical Questions)>Q 16

A particle covers half of its total distance with speed

v_{1}

and the rest half distance with speed

v_{2}

. Its average speed during the complete journey is:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Analytical Questions)>Q 17

A projectile is fired at an angle of

45 °

with the horizontal. The elevation angle of the projectile at its highest point as seen from the point of projection is:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Analytical Questions)>Q 18

The motion of a particle along a straight line is described by the equation

x = 8 + 12 t - t^{3}

, where

x

is in

metres

and

t

in

seconds

. The retardation of the particle when its velocity becomes zero is:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Analytical Questions)>Q 19

The horizontal range and the maximum height of a projectile are equal. The angle of projection of the projectile is:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Analytical Questions)>Q 20

A particle has initial velocity

(2 \hat{i} + 3 \hat{j})

and acceleration

(0.3 \hat{i} + 0.2 \hat{j})

. The magnitude of velocity after

10 seconds

will be