Forces of Nature Multiple Questions and Answers.




6.Two bodies w of masses m and 4m are moving with equal kinetic energies. What is the ratio of their linear momenta?
A. 1:2
B. 1:1
C. 4:1
D. 1:4

7.Water falls from a height of 60m at the rate of 15kg.s to operate a turbine. The losses due to friction forces are 10% of energy. How much power is generated by the turbine? g=m/s2?
A. 7kW
B. 10.2kW
C. 12.3kW
D. 8.1kW

8.A shell explodes into four unequal parts. Which one of the following is conserved?
A. Potential energy
B. Kinetic energy
C. Momentum
D. Both potential and kinetic energy

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