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If force \(F=500-100t,\) then the function of impulse with time will be:

1. \( 500 t-50 t^2 \)

2. \( 50 t-10 \)

3. \( 50-t^2 \)

4. \( 100 t^2\)

Subtopic: Application of Laws |

90%

From NCERT

AIPMT - 1998

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A particle of mass m is tied to a string of length L and whirled into a horizontal plane. If the tension in the string is T, then the speed of the particle will be:

1. $\sqrt{\frac{Tl}{m}}$

2. $\sqrt{\frac{2Tl}{m}}$

3. $\sqrt{\frac{3Tl}{m}}$

4. $\sqrt{\frac{T}{ml}}$

Subtopic: Uniform Circular Motion |

78%

From NCERT

AIPMT - 1998

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A small ball is suspended from a thread. If it is lifted up with an acceleration of 4.9 ms^{–2} and lowered with an acceleration of 4.9 ms^{–2}, then the ratio of the tension in the thread in both cases will be:

1. 1 : 3

2. 3 : 1

3. 1 : 1

4. 1 : 5

Subtopic: Application of Laws |

73%

From NCERT

AIPMT - 1998

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If a ladder is not in a balanced condition against a smooth vertical wall, then it can be brought to a balanced condition by:

1. | decreasing the length of the ladder. |

2. | increasing the length of the ladder. |

3. | increasing the angle of inclination. |

4. | decreasing the angle of inclination. |

Subtopic: Application of Laws |

62%

From NCERT

AIPMT - 1998

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For rocket propulsion, the velocity of exhaust gases relative to the rocket is \(2\) km/s. If the mass of a rocket system is \(1000\) kg, then the rate of fuel consumption for the rocket to rise up with an acceleration \(4.9\) m/s^{2} will be:

1. \(12.25\) kg/s

2. \(17.5\) kg/s

3. \(7.35\) kg/s

4. \(5.2\) kg/s

Subtopic: Variable Mass System |

65%

From NCERT

AIPMT - 1998

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A rigid rod is placed against the wall as shown in the figure. When the velocity at its lower end is \(10\) ms^{-1} and its base makes an angle \(\alpha=60^\circ\) with horizontal, then the vertical velocity of its end \(\mathrm{B}\) (in ms^{-1}) will be:

1. | \(10\sqrt{3}\) | 2. | \(\frac{10}{\sqrt{3}}\) |

3. | \(5\sqrt{3}\) | 4. | \(\frac{5}{\sqrt{3}}\) |

Subtopic: String Constraint |

61%

From NCERT

AIPMT - 1998

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If \(100\) N force is applied to \(10\) kg block as shown in diagram, then the acceleration produced for the slab will be:

1. \(1. 65 \) m/s^{2}

2. \(0.98 \) m/s^{2}

3. \(1. 2 \) m/s^{2}

4. \(0.25\) m/s^{2}

Subtopic: Friction |

58%

From NCERT

AIPMT - 1999

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Two masses as shown are suspended from a massless pulley. What would be the acceleration of the system when masses are left free?

1. \(2g/3\)

2. \(g/3\)

3. \(g/9\)

4. \(g/7\)

(where \(g\) is the acceleration due to gravity.)

Subtopic: Application of Laws |

93%

From NCERT

AIPMT - 2000

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A body of mass 3 kg hits a wall at an angle of 60º & returns at the same angle. The impact time was 0.2 s. Calculate the force exerted on the wall.

1. 150 $\sqrt{3}$ N

2. 50 $\sqrt{3}$ N

3. 100 N

4. 75 $\sqrt{3}$ N

Subtopic: Application of Laws |

84%

From NCERT

AIPMT - 2000

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A mass of 1 kg is thrown up with a velocity of 100 m/s. After 5 seconds, it explodes into two parts. One part of mass 400 g comes down with a velocity of 25 m/s. Calculate the velocity of the other part.

1. 40 m/s upward

2. 40 m/s downward

3. 100 m/s upward

4. 60 m/s downward

Subtopic: Application of Laws |

57%

From NCERT

AIPMT - 2000

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