A Text Book of PHYSICS PART I : CLASS 11>Chapter 5 - Motion of a Particle>EXERCISE>Q 29

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11th West Bengal Board

IMPORTANT

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When a ball is thrown vertically upward from the top point $A$ of a tower, it takes $t_{1}$ second to hit the ground. If it is thrown downward from $A$ with same velocity it takes $t_{2}$ second to hit the ground. If the stone is allowed to fall freely from $A$ , the time it will take to reach the ground is

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Important Questions on Motion of a Particle

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11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 5 - Motion of a Particle>EXERCISE>Q 30

A body is thrown vertically upward. The two instants when the body will reach

\frac{3}{4} t h

of the greatest height, are in the ratio of

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11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 5 - Motion of a Particle>EXERCISE>Q 31

For a projectile, the horizontal range is four times the maximum height when the angle of projection is equal to

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11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 5 - Motion of a Particle>EXERCISE>Q 32

Two particles

A

and

B

are projected with same velocities.

A

is projected vertically upwards while

B

is projected at an angle

45 °

with the horizontal. In this condition.

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11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 5 - Motion of a Particle>EXERCISE>Q 33

Three particles

A, B

and

C

are projected from the same point with same speeds, making angles

30 °, 45 °

and

60 °

respectively with the horizontal. On reaching the ground, it is found that,

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11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 5 - Motion of a Particle>EXERCISE>Q 34

For a projectile, its velocity is perpendicular to its acceleration

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11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 5 - Motion of a Particle>EXERCISE>Q 35

When the angle of projection is

15 °

, the horizontal range is

50 m

. When projected at an angle

45 °

with same velocity, the range is

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11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 5 - Motion of a Particle>EXERCISE>Q 36

The angle of projection of a projectile

A

is

15 °

while that for

B

is

45 °

. If

R_{A}

and

R_{B}

are their horizontal ranges respectively, then

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11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 5 - Motion of a Particle>EXERCISE>Q 37

A projectile is thrown at an angle of

30 °

with horizontal with a speed of

30 {ms}^{- 1}

. After

1.5

second, its angle with horizontal is