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Draw a flow chart showing classification of kingdom Plantae.
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What is hierarchy of categories? Describe the same.
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Write a note on kingdom Monera.
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Describe the characteristics of kingdom Protista.
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Write a note on kingdom Fungi.
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By how much will the kinetic energy of a body increase if its speed is doubled?
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Write an expression for the kinetic energy of a body of mass m moving with a velocity v.
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If the speed of a body is halved, what will be the change in its kinetic energy?
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On what factors does the kinetic energy of a body depend?
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Which would have a greater effect on the kinetic energy of an object : doubling the mass or doubling the velocity?
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How fast should a man of 50 kg run so that his kinetic energy be 625 J?
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What is the kinetic energy of a body of mass 1 kg moving with a speed of 2 m/s?
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Name the health problems subsequent to a disaster.
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How does the kinetic energy of a moving body depend on its (i) speed, and (ii) mass?
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A ball of mass 200 g falls from a height of 5 metres. What is its kinetic energy when it just reaches the ground? (g = 9.8 m/s2)
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Find the momentum of a body of mass 100 g having a kinetic energy of 20 J.
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Two objects having equal masses are moving with uniform velocities of 2 m/s and 6 m/s respectively. Calculate the ratio of their kinetic energies.
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A body of 2 kg falls from rest. What will be its kinetic energy during the fall at the end of 2 s? (Assume g = 10 m/s2)
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On a level road, a scooterist applies brakes to slow down from a speed of 10 m/s to 5 m/s. If the mass of the scooterist and the scooter be 150 kg, calculate the work done by the brakes. (Neglect air resistance and friction)
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A man drops a 10 kg rock from the top of a 5 m ladder. What is its speed just before it hits the ground? What is its kinetic energy when it reaches the ground? (g = 10 m/s2)
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