( 4 Consider the stationary situation shown in the sketch.The effect of friction is negligible. The 3 kg mass is joinedto the 4 kg trolley by a string passing over the pulley.When the 3 kg mass piece is released, it falls andaccelerates the trolley 2 m to the top of the runway. Inthe process, the trolley rises 1 m. Calculate :in the gain in potential energy of the trolley on reachingthe top of the runway: and) the speed of the trolley at the top of the runway.Take g = 10 ms47. The energy suppliedtricity board during awas 40 x 106 kWh. Ifby conversion of matteto be annihilated ?2 m48. 500 kg of water is heatethe increase in mass of49. The nucleus 57Fe emitmass of the nucleus is 50of the nucleus.1m4 kg3 kg3050. A nucleus of radium (2the emission of an a-pathe recoil energy of theFig. 6.82

( 4 Consider the stationary situation shown in the sketch.The effect

1.	( 4 Consider the stationary situation shown in the sketch.The effect of friction is negligible. The 3 kg mass is joinedto the 4 kg trolley by a string passing over the pulley.When the 3 kg mass piece is released, it falls andaccelerates the trolley 2 m to the top of the runway. Inthe process, the trolley rises 1 m. Calculate :in the gain in potential energy of the trolley on reachingthe top of the runway: and) the speed of the trolley at the top of the runway.Take g = 10 ms47. The energy suppliedtricity board during awas 40 x 106 kWh. Ifby conversion of matteto be annihilated ?2 m48. 500 kg of water is heatethe increase in mass of49. The nucleus 57Fe emitmass of the nucleus is 50of the nucleus.1m4 kg3 kg3050. A nucleus of radium (2the emission of an a-pathe recoil energy of theFig. 6.82
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