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A cyclist is travelling at 15 m s-1. She applies brakes so that she does not collide with a wall 18 m away. What deceleration must she have ?
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Find the acceleration produced by a force of 5 N acting on a mass of 10 kg.
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The graph given alongside shows the positions of a body at different times. Calculate the speed of the body as it moves from :
(1) A to B,
(2) B to C, and
(3) C to D.
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Name the law involved in the following situation :
if there were no friction and no air resistance, then a moving bicycle would go on moving for ever.
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A car is travelling at 20 m/s along a road. A child runs out into the road 50 m ahead and the car driver steps on the brake pedal. What must the car’s deceleration be if the car is to stop just before it reaches the child ?
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State whether the following statement is true or false :
The buoyant force depends on the nature of object immersed in the liquid
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In which direction does the buoyant force on an object due to a liquid act ?
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What is the other name of buoyant force ?
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Name the force which makes heavy objects appear light when immersed in a liquid.
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What is the scientific name of the 'upward force' acting on an object immersed in a liquid?
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What is meant by the term ‘buoyancy’ ?
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What causes buoyant force (or upthrust) on a boat ?
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An object of weight 200 N is floating in a liquid. What is the magnitude of buoyant force acting on it ?
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Name the scientist who gave he magnitude of buoyant force acting on a solid object immersed in a liquid.
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Why does a block of wood held under water rise to the surface when released ?
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Fill in the blank with suitable word :
It is the................. force which makes objects appear lighter in water.
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What happens to the buoyant force as more and more volume of a solid object is immersed in a liquid ? When does the buoyant force become maximum ?
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Why do we feel light on our feet when standing in a swimming pool with water up to our armpits ?
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Define buoyant force. Name two factors on which buoyant force depends.
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