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Maths-

General

Easy

Question

If a , b, c are in A.P., then r1, r2, r3 are in

A.P.
G.P.
H.P.
None of these

The correct answer is: H.P.

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If the sides be a, b, c then (r1–r) (r2+ r3) =

The velocity-time graph of a particle moving along a straight line is shown in figure. The displacement of the body in 5s is

The velocity-time graph of a particle moving along a straight line is shown in figure. The displacement of the body in 5s is
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A ball is thrown up under gravity ( $g equals 10 blank m divided by s e c to the power of 2 end exponent$ ). Find its velocity after $1.0 blank s e c$ at a height of $10 m$

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Consider a rubber ball freely falling from a height $h equals 4.9 blank m$ onto a horizontal elastic plate. Assume that the duration of collision is negligible and the collision with the plate is totally elastic. Then the velocity as a function of time will be

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A body of $5 blank k g$ is moving with a velocity of $blank 20 m divided by s$ . If a force of $100 N$ is applied on it for $10 s$ in the same direction as its velocity, what will now be the velocity of the body

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The displacement of the particle varies with time according to the relation $x equals fraction numerator k over denominator b end fraction open square brackets 1 minus e to the power of negative b t end exponent close square brackets.$ Then the velocity of the particle is

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A cricket ball is thrown up with a speed of $19.6 blank m s to the power of negative 1 end exponent$ . The maximum height it can reach is

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A ball is thrown vertically upwards. Which of the following plots represents the speed-time graph of the ball during its flight if the air resistance is not ignored

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Physics-General

Two bodies of different masses $m subscript a end subscript$ and $m subscript b end subscript$ are dropped from two different heights $a$ and $b$ . The ratio of the time taken by the two to cover these distances are

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A body projected vertically upwards with velocity $u$ returns to the starting point in $4 blank$ seconds. If $g equals 10 blank m divided by s e c to the power of 2 end exponent$ , the value of $u$ is

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A body is moving from rest under constant acceleration and let $S subscript 1 end subscript$ be the displacement in the first $open parentheses P minus 1 close parentheses$ sec and $S subscript 2 end subscript$ be the displacement in the first $P$ sec. The displacement in $open parentheses P to the power of 2 end exponent minus P plus 1 close parentheses to the power of t h end exponent$ see will be

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A man is $45 blank m$ behind the bus when the bus start accelerating from rest with acceleration $2.5 blank m divided by s to the power of 2 end exponent$ . With what minimum velocity should the man start running to catch the bus

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When a ball is thrown up vertically with velocity $V subscript 0 end subscript$ , it reaches a maximum height of $´ h ´$ . If one wishes to triple the maximum height then the ball should be thrown with velocity

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Which graph represents a state of rest for an object

Which graph represents a state of rest for an object

Physics-General

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