21)a)I)When a ball is thrown inside a moving bus does its KE depend on the speed of the bus? II) Derive a expression for Lateral Shift. (2+2). b)In loading a truck a man shifts boxes of 100 N each,through a height of 1.5 m. I)How much E is transferred when one box is lifted. II)if he lifts 4 boxes per minute ,what power he is doing work? (3) c)Which radiation is used for signal during war,state its wavelength and how it can be detected? (3)
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Yes, the kinetic energy of a ball thrown inside a moving bus depends on the speed of the bus. This is because the speed of bus adds up to the speed with which the ball is thrown inside the moving bus
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21)a)I)When a ball is thrown inside a moving bus does its KE depend on the speed of the bus? II) Derive a expression for Lateral Shift. (2+2). b)In loading a truck a man shifts boxes of 100 N each,through a height of 1.5 m. I)How much E is transferred when one box is lifted. II)if he lifts 4 boxes per minute ,what power he is doing work? (3) c)Which radiation is used for signal during war,state its wavelength and how it can be detected? (3
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