QuestionPhysics / work and energy
A stone of mass 1 kg and initially at rest is dropped from a tower of height 40 m. When it reaches a height of 10 m from the ground level, what will be the values of its potential energy (PE) and kinetic energy (KE)? (Acceleration due to gravity is 10 m/s²)
- (a) PE = 300 J, KE = 100 J
- (b) PE = 200 J, KE = 200 J
- (c) PE = 100 J, KE = 300 J
- (d) PE = 100 J, KE = 200 J
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