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Physics-

General

Easy

Question

A force F is applied vertically upward to the pulley and it is observed that the pulley in the figure moves upward with a uniform velocity of 2 m/s. The possible value(s) of F is/are (in newtons)

150
120
75
400.

The correct answer is: 75

Related Questions to study

Two blocks of masses m₁ and m₂ are connected through a massless inextensible string. Block of mass m₁ is placed at the fixed rigid inclined surface while the block of mass m₂ hanging at the other end of the string, which is passing through a fixed massless frictionless pulley shown in figure. The coefficient of static friction between the block and the inclined plane is 0.8. The system of masses m₁ and m₂ is released from rest.

Two blocks of masses m₁ and m₂ are connected through a massless inextensible string. Block of mass m₁ is placed at the fixed rigid inclined surface while the block of mass m₂ hanging at the other end of the string, which is passing through a fixed massless frictionless pulley shown in figure. The coefficient of static friction between the block and the inclined plane is 0.8. The system of masses m₁ and m₂ is released from rest.

Physics-General

The figure shows a block of mass m placed on a smooth wedge of mass M. Calculate the value of M¢ and tension in the string, so that the block of mass m will move vertically downward with acceleration 10 m/s²
(Take g = 10 m/s²)

The figure shows a block of mass m placed on a smooth wedge of mass M. Calculate the value of M¢ and tension in the string, so that the block of mass m will move vertically downward with acceleration 10 m/s²
(Take g = 10 m/s²)

Physics-General

In the figure, a man of true mass M is standing on a weighing machine placed in a cabin. The cabin is joined by a string with a body of mass m. Assuming no friction, and negligible mass of cabin and weighing machine, the measured mass of man is (normal force between the man and the machine is proportional to the mass)

In the figure, a man of true mass M is standing on a weighing machine placed in a cabin. The cabin is joined by a string with a body of mass m. Assuming no friction, and negligible mass of cabin and weighing machine, the measured mass of man is (normal force between the man and the machine is proportional to the mass)

Physics-General

parallel

In the figure small block is kept on m then

In the figure small block is kept on m then

Physics-General

In a sequence of (4n + 1) terms the first (2n + 1) terms are in AP whose common difference is 2 and the last (2n + 1) terms are in GP whose common ratio is 0.5. If the middle terms of the AP and GP are equal then the middle term of the sequence is

In a sequence of (4n + 1) terms the first (2n + 1) terms are in AP whose common difference is 2 and the last (2n + 1) terms are in GP whose common ratio is 0.5. If the middle terms of the AP and GP are equal then the middle term of the sequence is

If $x subscript i end subscript greater than 0 comma i equals 1 , 2 comma horizontal ellipsis comma 50$ and $x subscript 1 end subscript plus x subscript 2 end subscript plus midline horizontal ellipsis plus x subscript 50 end subscript equals 50$ , then the minimum value of $fraction numerator 1 over denominator x subscript 1 end subscript end fraction plus fraction numerator 1 over denominator x subscript 2 end subscript end fraction plus midline horizontal ellipsis plus fraction numerator 1 over denominator x subscript 50 end subscript end fraction$ equals

If $x subscript i end subscript greater than 0 comma i equals 1 , 2 comma horizontal ellipsis comma 50$ and $x subscript 1 end subscript plus x subscript 2 end subscript plus midline horizontal ellipsis plus x subscript 50 end subscript equals 50$ , then the minimum value of $fraction numerator 1 over denominator x subscript 1 end subscript end fraction plus fraction numerator 1 over denominator x subscript 2 end subscript end fraction plus midline horizontal ellipsis plus fraction numerator 1 over denominator x subscript 50 end subscript end fraction$ equals

parallel

If $fraction numerator 3 plus 5 plus 7 plus midline horizontal ellipsis plus n text terms end text over denominator 5 plus 8 plus 11 plus midline horizontal ellipsis plus 10 text terms end text end fraction equals 7$ , then the value of $n$ is

If $fraction numerator 3 plus 5 plus 7 plus midline horizontal ellipsis plus n text terms end text over denominator 5 plus 8 plus 11 plus midline horizontal ellipsis plus 10 text terms end text end fraction equals 7$ , then the value of $n$ is

If $t subscript r end subscript equals fraction numerator r plus 2 over denominator r left parenthesis r plus 1 right parenthesis end fraction cross times fraction numerator 1 over denominator 2 to the power of r plus 1 end exponent end fraction$ , then $sum subscript r equals 1 end subscript superscript n end superscript t subscript r end subscript$ is equal to

If $t subscript r end subscript equals fraction numerator r plus 2 over denominator r left parenthesis r plus 1 right parenthesis end fraction cross times fraction numerator 1 over denominator 2 to the power of r plus 1 end exponent end fraction$ , then $sum subscript r equals 1 end subscript superscript n end superscript t subscript r end subscript$ is equal to

The sum of $fraction numerator 1 over denominator 2 end fraction plus fraction numerator 1 over denominator 3 times 2 to the power of 3 end exponent end fraction plus fraction numerator 1 over denominator 5 times 2 to the power of 5 end exponent end fraction plus midline horizontal ellipsis infinity$ is

The sum of $fraction numerator 1 over denominator 2 end fraction plus fraction numerator 1 over denominator 3 times 2 to the power of 3 end exponent end fraction plus fraction numerator 1 over denominator 5 times 2 to the power of 5 end exponent end fraction plus midline horizontal ellipsis infinity$ is

parallel

$1 plus fraction numerator 1 plus 2 over denominator 2 factorial end fraction plus fraction numerator 1 plus 2 plus 3 over denominator 3 factorial end fraction plus fraction numerator 1 plus 2 plus 3 plus 4 over denominator 4 factorial end fraction plus midline horizontal ellipsis infinity equals$

$1 plus fraction numerator 1 plus 2 over denominator 2 factorial end fraction plus fraction numerator 1 plus 2 plus 3 over denominator 3 factorial end fraction plus fraction numerator 1 plus 2 plus 3 plus 4 over denominator 4 factorial end fraction plus midline horizontal ellipsis infinity equals$

The sum of the series $1 times 3 to the power of 2 end exponent plus 2 times 5 to the power of 2 end exponent plus 3 times 7 to the power of 2 end exponent plus midline horizontal ellipsis$ up to 20 terms is

The sum of the series $1 times 3 to the power of 2 end exponent plus 2 times 5 to the power of 2 end exponent plus 3 times 7 to the power of 2 end exponent plus midline horizontal ellipsis$ up to 20 terms is

$text If the end text left parenthesis m plus 1 right parenthesis to the power of text th end text end exponent comma left parenthesis n plus 1 right parenthesis to the power of text th end text end exponent text and end text left parenthesis r plus 1 right parenthesis to the power of text th end text end exponent text terms of an AP are in GP end text$ and m, n, r are in HP, then the value of the ratio of the common difference to the first term of the AP is

$text If the end text left parenthesis m plus 1 right parenthesis to the power of text th end text end exponent comma left parenthesis n plus 1 right parenthesis to the power of text th end text end exponent text and end text left parenthesis r plus 1 right parenthesis to the power of text th end text end exponent text terms of an AP are in GP end text$ and m, n, r are in HP, then the value of the ratio of the common difference to the first term of the AP is

parallel

If the harmonic mean between a and b is H, then $fraction numerator H plus a over denominator H minus a end fraction plus fraction numerator H plus b over denominator H minus b end fraction equals$

If the harmonic mean between a and b is H, then $fraction numerator H plus a over denominator H minus a end fraction plus fraction numerator H plus b over denominator H minus b end fraction equals$

If $fraction numerator a to the power of n plus 1 end exponent plus b to the power of n plus 1 end exponent over denominator a to the power of n end exponent plus b to the power of n end exponent end fraction$ is the harmonic mean between $a$ and $b$ , then the value of $n$ is

If $fraction numerator a to the power of n plus 1 end exponent plus b to the power of n plus 1 end exponent over denominator a to the power of n end exponent plus b to the power of n end exponent end fraction$ is the harmonic mean between $a$ and $b$ , then the value of $n$ is

If a ,b, c are three distinct positive real numbers which are in $text HP, then end text fraction numerator 3 a plus 2 b over denominator 2 a minus b end fraction plus fraction numerator 3 c plus 2 b over denominator 2 c minus b end fraction text is end text$

If a ,b, c are three distinct positive real numbers which are in $text HP, then end text fraction numerator 3 a plus 2 b over denominator 2 a minus b end fraction plus fraction numerator 3 c plus 2 b over denominator 2 c minus b end fraction text is end text$

parallel

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