PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
Two friends, Anil and Beena, are cycling on a level road.
The following data are noted:
• Combined mass of Anil and his bicycle: 75kg
• Speed of Anil with the bicycle: 4m/s
• Combined mass of Beena and her bicycle: 60kg
• Both riders have the same kinetic energy at that instant.
Answer the questions below:
(i) Calculate the kinetic energy of Anil and his bicycle.
(ii) Determine the speed of Beena and her bicycle so that their kinetic energies are equal.
(iii) Both riders now increase their individual speeds by a factor of 1.5. Compute the new kinetic energy of Beena and state the factor by which her kinetic energy has changed compared to her value in part (ii).