Browse and search thousands of solved questions for your preparation.
Free questions with full explanations — locked behind signup to protect quality.
The x-t graph shown in figure represents
A ball is thrown vertically upwards. Which of the following graph/graphs represent velocity-time graph of the ball during its flight (air resistance is neglected)
The displacement-time graph of a moving particle is shown below. The instantaneous velocity of the particle is negative at the point
Velocity-time curve for a body projected vertically upwards is
The relation $3t = \sqrt{3x} + 6$ describes the displacement of a particle in one direction where $x$ is in metres and $t$ in seconds. The displacement, when velocity is zero, is:
Choose the correct circuit which can achieve the bridge balance :
A balloon is at a height of $81 \text{ m}$ and is ascending upwards with a velocity of $12 \text{ m/s}$. A body of $2 \text{ kg}$ weight is dropped from it. If $g=10 \text{ m/s}^2$, the body will reach the surface of the earth in:
A stone is thrown vertically downwards with an initial velocity of $40 \text{ m/s}$ from the top of a building. If it reaches the ground with a velocity of $60 \text{ m/s}$, then the height of the building is: (take $g=10 \text{ m/s}^2$)
The ratio of the distances travelled by a freely falling body in the 1st, 2nd, 3rd and 4th second is:
An object falls freely from height $h$ above the ground. It travels $\frac{5}{9}h$ of the total height in the last $1\text{ s}$. The height $h$ is: (use $g=10\text{ m/s}^2$)
A vehicle travels half the distance with speed $v$ and the remaining distance with speed $2v$. Its average speed is:
A stone is thrown with an initial speed of $4.9 \text{ m/s}$ from a bridge in vertically upward direction. It falls down in water after $2 \text{ sec}$. The height of the bridge is:
A stone dropped from the top of the tower touches the ground in $4 \text{ sec}$. The height of the tower is about:
A cricket ball is thrown up with a speed of $19.6 \text{ ms}^{-1}$. The maximum height it can reach is:
From the top of a tower, a particle is thrown vertically downwards with a velocity of $10 \text{ m/s}$. The ratio of the distances, covered by it in the 3rd and 2nd seconds of the motion is (Take $g=10 \text{ m/s}^2$):
A $12\text{ V}$, $60\text{ W}$ lamp is connected to the secondary of a step-down transformer, whose primary is connected to ac mains of $220\text{ V}$. Assuming the transformer to be ideal, what is the current in the primary winding?
A police jeep is chasing with a velocity of $45 \text{ km/h}$ a thief in another jeep moving with a velocity of $153 \text{ km/h}$. Police fire a bullet with a muzzle velocity of $180 \text{ m/s}$. The velocity with which it will strike the car of the thief is:
Two balls are dropped from heights h and 2h respectively from the earth surface. The ratio of time of these balls to reach the earth is:
A ball is dropped on the floor from a height of $10 \text{ m}$. It rebounds to a height of $2.5 \text{ m}$. If the ball is in contact with the floor for $0.01 \text{ sec}$, the average acceleration during contact is:
The electric charge in uniform motion produces :