Q. When we add two vectors, the single vector as a result is known as the

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Q. The force that opposes motion and exist between the surfaces of two objects in contact is called

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Q. It always opposes motion between two surfaces in contact

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Q. If a book is moving towards the left, friction will act towards

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Q. A aircraft starts from rest and its propeller produces a forward force of 30000 N. The mass of the aircraft is 35000 kg. If there is no friction then the initial acceleration of the aircraft is

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Q. Friction can reduce the efficiency of cars upto

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Q. A truck engine having mass of 4000 kg is pulling a lorry of mass 1000 kg along a level of path at an acceleration of 0.25 ms⁻². The resistances are 8 N per 1000 kg for the truck engine and 10 N per 1000 kg for the lorry. What is the tension connecting two bar between the engine and the lorry?

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Q. A truck engine having mass of 4000 kg is pulling a lorry of mass 1000 kg along a level of path at an acceleration of 0.25 ms⁻². The resistances are 8 N per 1000 kg for the truck engine and 10 N per 1000 kg for the lorry. What is the forward thrust exerted by the engine?

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Q. In our daily lives, the effects of friction are

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Q. The natural pressure within our bodies is about

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Q. The air pressure at high altitudes is

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Q. The value of the pressure exerted by the layer of air at sea level is commonly referred to as

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Q. If the density of water is 1000 kg m⁻³, atmospheric pressure is 1.01 × 10⁵ and gravitational field strength is 10 N kg⁻¹.What is the pressure acting on a scuba diver when he is at the surface?

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Q. The pressure exerted by the layer of air at sea level is

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Q. If the density of water is 1000 kg m⁻³, atmospheric pressure is 1.01 × 10⁵ and gravitational field strength is 10 N kg⁻¹.What is the pressure acting on a scuba diver when he 10 m deep in the sea?

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Q. The layer of pressure exerts a pressure on Earth's surface, which is known as

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Q. An instrument that uses the height of a mercury column to measure atmospheric pressure is known as

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Q. 1 atmosphere is almost equivalent to placing

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Q. An instrument used to measure the differences in pressure of gases or liquids is known as

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Q. The density of mercury is

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