Question
An object falls from a height of 10 m above the ground. After striking the ground it loses 50 \% of its kinetic energy. The height upto which the object can rebounce from the ground is:
NEET
Physics
Work Power Energy
2024
NEET 2024 (Re-NEET)
NEET Physics Question (2024) — Solution
Options
- A. 7.5 m
- B. 10 m
- C. 2.5 m
- D. 5 m
Answer
D. 5 m
Step-by-step solution
K.E. just before striking the ground K_1=m g h_1=m g(10) K.E. just after striking the ground =K_1- 50 100 K_1= 50 100 K_1= K_1 2 =K_2 Now, K_2=m g h_2 K_1 2 =m g h_2 m g(10) 2 =m g h_2 h_2=5 ~m
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