Question

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4 Consider the stationary situation shown in the sketch.
The effect of friction is negligible. The 3 kg mass is joined
to the 4 kg trolley by a string passing over the pulley.
When the 3 kg mass piece is released, it falls and
accelerates the trolley 2 m to the top of the runway. In
the process, the trolley rises 1 m. Calculate :
in the gain in potential energy of the trolley on reaching
the top of the runway: and
) the speed of the trolley at the top of the runway.
Take g = 10 ms
47. The energy supplied
tricity board during a
was 40 x 106 kWh. If
by conversion of matte
to be annihilated ?
2 m
48. 500 kg of water is heate
the increase in mass of
49. The nucleus 57Fe emit
mass of the nucleus is 50
of the nucleus.
1m
4 kg
3 kg
30
50. A nucleus of radium (2
the emission of an a-pa
the recoil energy of the
Fig. 6.82​

Answer 1

Answer:

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