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A block of mass weighing $10 kg$ moving in $x$ -direction with a constant speed of $10 m s^{- 1}$ is subjected to a retarding force, $F = 0.1 x J m^{- 1}$ during its travel from $x = 20 m$ to $30 m$ . Its final kinetic energy will be,

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Important Questions on Force

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 3 - Force>Competitive Thinking>Q 45

A time-dependent force,

F = 6 t

N

acts on a particle of mass

1 kg

. If the particle starts from rest, the work done by the force during the first

1

sec will be,

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 3 - Force>Competitive Thinking>Q 47

A body of mass $2.4 kg$ is subjected to a force which varies with distance as shown in the figure. The body starts from rest at $x = 0$ . Its velocity at $x = 9 m$ is

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 3 - Force>Competitive Thinking>Q 48

A person trying to lose weight by burning fat lifts a mass of

10 kg

up to a height of

1 m a 1000

times. Assuming that the potential energy lost each time he lowers the mass is dissipated, how much fat will he use up considering the work done only when the weight is lifted up? Fat supplies

3.8 \times 10^{7} J

of energy per

kg

which is converted to mechanical energy with

20 %

efficiency rate. Take,

g = 9.8 {ms}^{- 2}

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 3 - Force>Competitive Thinking>Q 49

A bullet hits and gets embedded in solid block resting on a frictionless surface. In this process, which one of the following is correct?

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 3 - Force>Competitive Thinking>Q 50

In an inelastic collision,

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 3 - Force>Competitive Thinking>Q 51

A ball of mass

M_{1}

collides elastically and head on with another ball of mass

M_{2}

initially at rest. In which of the following cases the transfer of momentum will be maximum?

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 3 - Force>Competitive Thinking>Q 52

Two identical balls

A

and

B

having velocities of

0.5 m s^{- 1}

and

- 0.3 m s^{- 1}

, respectively, collide elastically in one dimension. The velocities of

B

and

A

after the collision, respectively, will be,

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 3 - Force>Competitive Thinking>Q 53

A bullet of mass

10 g

moving with

300 m s^{- 1}

hits a block of ice of mass

5 kg

and drops dead. The velocity of ice is

A block of mass weighing 10 kg moving in x-direction with a constant speed of 10 m s-1 is subjected to a retarding force, F=0.1x J m-1 during its travel from x=20 m to 30 m. Its final kinetic energy will be,

Important Questions on Force

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A block of mass weighing $10 kg$ moving in $x$ -direction with a constant speed of $10 m s^{- 1}$ is subjected to a retarding force, $F = 0.1 x J m^{- 1}$ during its travel from $x = 20 m$ to $30 m$ . Its final kinetic energy will be,