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Question (21)

QN0034920

Two pegs and thrown with speeds in the ratio acquired the same heights. If is thrown at an angle of with the horizontal, the angle of projection of will be

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

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Question (22)

QN0034921

A body projected at an angle with the horizontal has a range . If the time of flight is , then the horizontal component of velocity is

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

As we know,

Given,

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Question (23)

QN0034922

The range of a projectile is when the angle of projection is . For the same velocity of projection and range, the other possible angle of projection is

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

Horizontal range .

Range is same for angle of projection and .

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Question (24)

QN0034923

If the angles of projection of a projectile with same initial velocity exceed or fall short of by equal amounts, then the ratio of horizontal ranges is

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

For complementary angles of projection and with same initial velocity , range is same.

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Question (25)

QN0034924

The equation of a projectile is The angle of projection is given by

(A)
(B)
(C)
(D)
zero

Correct Answer: B

Explanation:

Comparing the given equation with

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Question (26)

QN0034925

Equation of trajectory of projectile is given by , where and are in meter. The maximum range of the projectile is

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

Comparing the given equation with the equation of trajectory of a projectile,

we get,

and

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Question (27)

QN0034926

A stone is just released from the window of a moving train moving along a horizontal straight track. The stone will hit the ground following a

(A)
straight line path
(B)
parabolic path
(C)
circular path
(D)
hyperbolic path

Correct Answer: C

Explanation:

Now,

the horizontal velocity of the stone will be the same as that of the train. In this way, the horizontal motion will be uniform. The vertical motion will be controlled by the force of gravity. Hence it is accelerated motion. The resultant motion is a parabolic trajectory.

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Question (28)

QN0034927

A ball is thrown from rear end of the compartment of train to the front end which is moving at a constant horizontal velocity. An observer A sitting in the compartment and another observer B standing on the ground draw the trajectory. They will have

(A)
equal horizontal and equal vertical ranges
(B)
equal vertical ranges but different horizontal ranges
(C)
different vertical ranges but equal horizontal ranges
(D)
different vertical and different horizontal ranges

Correct Answer: B

Explanation:

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Question (29)

QN0034928

A stone is projected horizontally with velocity from a height . It's time of flight is:

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

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Question (30)

QN0034929

A body of mass is projected at an angle of with the horizontal. The trajectory of the body is observed to pass through a point . If is time of flight, then its momentum vector, at time , is [Take ]

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

Equation of trajectory of projectile

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Question (21)

Two pegs and thrown with speeds in the ratio acquired the same heights. If is thrown at an angle of with the horizontal, the angle of projection of will be

Explanation:

Link:

Question (22)

A body projected at an angle with the horizontal has a range . If the time of flight is , then the horizontal component of velocity is

Explanation:

Link:

Question (23)

The range of a projectile is when the angle of projection is . For the same velocity of projection and range, the other possible angle of projection is

Explanation:

Link:

Question (24)

If the angles of projection of a projectile with same initial velocity exceed or fall short of by equal amounts, then the ratio of horizontal ranges is

Explanation:

Link:

Question (25)

The equation of a projectile is The angle of projection is given by

Explanation:

Link:

Question (26)

Equation of trajectory of projectile is given by , where and are in meter. The maximum range of the projectile is

Explanation:

Link:

Question (27)

A stone is just released from the window of a moving train moving along a horizontal straight track. The stone will hit the ground following a

Explanation:

Link:

Question (28)

A ball is thrown from rear end of the compartment of train to the front end which is moving at a constant horizontal velocity. An observer A sitting in the compartment and another observer B standing on the ground draw the trajectory. They will have

Explanation:

Link:

Question (29)

A stone is projected horizontally with velocity from a height . It's time of flight is:

Explanation:

Link:

Question (30)

A body of mass is projected at an angle of with the horizontal. The trajectory of the body is observed to pass through a point . If is time of flight, then its momentum vector, at time , is [Take ]

Explanation:

Link:

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