1
Question
A stone of mass 500g is thrown vertically upwards with a velocity of 15ms−1. Calculate the kinetic energy just before reaching the ground.
A stone of mass 500g is thrown vertically upwards with a velocity of 15ms−1. Calculate the kinetic energy just before reaching the ground.
Open in App
Solution
The correct option is C 56.25J
Kinetic Energy, K.E=0.5×m×v2
K.E=0.5×0.5×15×15=56.25J
It has 56.25 J at initial point as total energy.
Total energy=P.E.+K.E.
56.25=P.E.+K.E.
As energy is conserved total energy after reaching ground also must be 56.25 J at which P.E. has a value of zero because of zero height.
Hence K.E=56.25J.
Kinetic Energy, K.E=0.5×m×v2
K.E=0.5×0.5×15×15=56.25J
It has 56.25 J at initial point as total energy.
Total energy=P.E.+K.E.
56.25=P.E.+K.E.
As energy is conserved total energy after reaching ground also must be 56.25 J at which P.E. has a value of zero because of zero height.
Hence K.E=56.25J.
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
