Question

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Answer 1

(a) The S.I. unit of force is kgf.

Answer: False.

(b) A force always produces both the linear and turning motions.

Answer: False.

(c) Moment of force = force × perpendicular distance of force – from the pivoted point.

Answer: True.

(d) Less force is needed when applied at a farther distance from the pivoted point.

Answer 2

Answer:

1. true
2. true
3. true
4. true

5. true

question answer

1. Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre. ... Density can also be expressed as kilograms per cubic metre
2. According to him, all the objects placed in a liquid experience an upward force which allows the body to float if it displaces water with the weight equal to the weight of the body. This upward force is known as buoyant force and the law is known as the law of buoyancy. Mainly, floatation depends upon the density.
3. Camels have broad feet i.e., feet having a large are so that the pressure exerted on the sand is less due to their heavy weight. Therefore, camels do not dig deep in the sand dunes and can move freely.
4. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer. ... One atmosphere is 1,013 millibars, or 760 millimeters
5. the energy possessed by a body due to its state of rest or position is called potential energy. it's S.I unit is joule.

Explanation:

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