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10.A stone is thrown vertically upwards with a velocity of 40 m/s.(a)At what height will its kinetic energy and potential energy be equal?Calculate the potential energy of the body if its mass - 10 kg. |
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Answer» v=40m/sm= 10kgTaking g= 10m/s[Answer may varry if g=9.8m/s] K.E=P.E 1/2mv^2=mgh1/2×10×(40)^2=10×10×h5×1600=100×h8000=100×h8000/100=hh=80m At height of 80m , Kinetic energy= Potential energy |
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