Recent questions in Physics

The angle between $(\overrightarrow{P}+\overrightarrow{Q})$ and $(\overrightarrow{P}+\overrightarrow{Q})$ is

asked Jul 17, 2014 by meena.p

1 answer

Three vectors $\overrightarrow{A},\overrightarrow{B} $ and $ \overrightarrow{C}$ satisfy the relation $\overrightarrow{A}.\overrightarrow{B}= 0$ and $\overrightarrow{A}.\overrightarrow{C}=0$ Vector $\overrightarrow{A}$ is parallel to

asked Jul 17, 2014 by meena.p

1 answer

The scalar product of two vector $\overrightarrow{A}$ and $\overrightarrow{B}$ is $5 \sqrt 3$ and the magnitude of their vector product is 5. The angle between the vectors $\overrightarrow{A}$ and $\overrightarrow{B}$ is

asked Jul 16, 2014 by meena.p

1 answer

If $\overrightarrow{A}= 5 \hat i +7 \hat j - 3 \hat k$ and $\overrightarrow{B}=2\hat i +2 \hat {j} +8 \hat {k}$ the angle between $\overrightarrow{A}$ and $\overrightarrow{B}$ is

asked Jul 16, 2014 by meena.p

1 answer

If the magnitudes of vectors $\overrightarrow{A},\overrightarrow{B},\overrightarrow{C}$ are 3,4 and $\theta$ units respectively and if $\overrightarrow{A}+\overrightarrow{B}=\overrightarrow{C},$ then the angle between $\overrightarrow{A}$ and $\overrightarrow{B}$ is

asked Jul 16, 2014 by meena.p

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An aeroplane is moving on a circular path with a speed of $250 \;kmhr^{-1}$ The change in its velocity in half revolution is

asked Jul 16, 2014 by meena.p

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The angle between two vectors $\overrightarrow{A}$ and $\overrightarrow{B}$ is $\theta$ . Resultant of these two vectors is $ \overrightarrow{R}$ Which makes an angle of $\large\frac{\theta}{2}$ with $\overrightarrow{A}$. Which of the following is true?

asked Jul 16, 2014 by meena.p

1 answer

Following sets of forces act on a body. In which case the resultant cannot be zero.

asked Jul 16, 2014 by meena.p

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Two forces have magnitudes in the ratio of $3:5$ and the angle between their direction is $60^{\circ}$ . If their resultant is $35 N$ their magnitude are

asked Jul 16, 2014 by meena.p

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A man travels 1 km east , then 5 km due south , then 2 km due east and finally 9 km due north. How far is he from the starting point ?

asked Jul 16, 2014 by meena.p

1 answer

A ball slides off a horizontal table top $1.25 \;m$ hight, with a velocity of $4ms^{-1}$ Find the horizontal distance from the edge of the table at which the ball strikes the ground. $(g= 10 ms^{-2})$

asked Jul 16, 2014 by meena.p

1 answer

A ball is thrown with an initial velocity of 30 m/s at an angle of 60$^{\circ}$ above the horizontal. Find the maximum height the ball can travel to?

asked Jul 16, 2014 by meena.p

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The equation of trajectory of a projectile is given by $y=x -\large\frac{x^2}{100}$ Find the range .

asked Jul 15, 2014 by meena.p

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The equation of trajectory of a projectile is given by $y=x -\large\frac{x^2}{100}$ Find the maximum height.

asked Jul 15, 2014 by meena.p

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The equation of trajectory of a projectile is given by $y=x -\large\frac{x^2}{100}$ Find velocity of projection .

asked Jul 15, 2014 by meena.p

1 answer

The equation of trajectory of a projectile is given by $y=x -\large\frac{x^2}{100}$ Find velocity of projection .

asked Jul 15, 2014 by meena.p

1 answer

It is possible to project a particle with a given velocity in two possible ways so as to make it pass through a point at a horizontal distance R from the point of projection .If $H_1$ and $H_2$ are the corresponding maximum height and $H$ is maximum height when the particle is projected at $45^{\circ}$ with the same speed, then what is $H_1+H_2$

asked Jul 15, 2014 by meena.p

1 answer

It is possible to project a particle with a given velocity in two possible ways so as to make it pass through a point at a horizontal distance R from the point of projection . If $t_1$ and $t_2$ are the time taken to reach this point in two possible ways then what is $t_1t_2$?

asked Jul 15, 2014 by meena.p

1 answer

A ball rolls off the top of a stairway with a velocity u. If the height of each step is h, the breadth is b and the ball hits the edge of nth steps, the find the value of n.

asked Jul 15, 2014 by meena.p

1 answer

A man can throw a stone 60 m away . How high can he throw the stone vertically upward?

asked Jul 15, 2014 by meena.p

1 answer

A car travels east at a speed of $30m/s^{-1}$ . It turns left through an angle of $90^{\circ}$ and continues to travel with the same speed. What is the change in its velocity ?

asked Jul 15, 2014 by meena.p

1 answer

A body is projected with speed $v_1$ at an angle of $45^{\circ}$ to the horizontal from a point A. At the same instant, another body is projected vertically below the highest point of the path of the first body, Both the bodies will collide if $v_1/v_2$ is

asked Jul 14, 2014 by meena.p

1 answer

A projectile is thrown with velocity u making angle $\theta$ with vertical. It just crosses the tops of two poles each of height h after 1 second respectively. The maximum height of projectile is

asked Jul 14, 2014 by meena.p

1 answer

From a point on the group at a distance 2 meters from the foot of a vertical wall , a ball is thrown at an angle $45^{\circ}$ which just clear the top of the wall and afterwards strikes the ground at a distance 4 m on the other side. The height of the wall is

asked Jul 14, 2014 by meena.p

1 answer

The velocity at the maximum height of a projectile is half of its initial velocity of projection u. Its range on horizontal plane is

asked Jul 14, 2014 by meena.p

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A body is projected at an angle $30^{\circ}$ to the horizontal with a speed $39.2 ms^{-1}$.What is the angle of projectile with the horizontal after 2 seconds ? (take $g= 9.8\;ms^{-2} )$

asked Jul 14, 2014 by meena.p

1 answer

The velocity of projection of an oblique projectile is $(6i +8j)m/s$ . The horizontal range of projectile is $( g=10 m/s)^2$

asked Jul 14, 2014 by meena.p

1 answer