Question

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Answer 1

1. The S.I. unit of force is kgf.

False. The S.I unit of force is Newton.

2. A force always produces both the linear and turning motions.

False.

3. Moment of force = force × perpendicular distance of force - from the pivoted point.

True.

4. Less force is needed when applied at a farther distance from the pivoted point.

True.

5. For a given thrust, pressure is more on a surface of larger area.

False.For a given thrust, pressure is less on a surface of larger area.

6. A coolie does no work against the force of gravity while carrying luggage on a road

True.

7. The energy stored in the water of a dam is the kinetic energy.

False.The energy stored in the water of a dam is the Potential energy.

8. The energy of a flying kite is kinetic energy.

True.

9. Work done by a boy depends on the time in which he does work.

False. Work done by a boy doesn't depends on the time in which he does work because W = f × s.

10. Power spent by a body depends on the time for which it does work.

True.

Answer 2

Answer:

$1. The S.I. unit of force is kgf.</p><p> False. The S.I unit of force is Newton.</p><p></p><p>2. A force always produces both the linear and turning motions.</p><p>False. </p><p></p><p>3. Moment of force = force × perpendicular distance of force - from the pivoted point.</p><p>True.</p><p></p><p>4. Less force is needed when applied at a farther distance from the pivoted point.</p><p>True.</p><p></p><p>5. For a given thrust, pressure is more on a surface of larger area.</p><p>False.For a given thrust, pressure is less on a surface of larger area.</p><p></p><p>6. A coolie does no work against the force of gravity while carrying luggage on a road</p><p>True.</p><p></p><p>7. The energy stored in the water of a dam is the kinetic energy.</p><p>False.The energy stored in the water of a dam is the Potential energy.</p><p></p><p>8. The energy of a flying kite is kinetic energy.</p><p>True.</p><p></p><p>9. Work done by a boy depends on the time in which he does work.</p><p>False. Work done by a boy doesn't depends on the time in which he does work because W = f × s.</p><p></p><p>10. Power spent by a body depends on the time for which it does work.</p><p>True.$