An objet of mass 10 kg is dropped from a height of 100 cm. Find its kinetic energy and velocity before it reaches the ground . Take g =10m/s²
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m = 10 kg
h = 100 cm = 1 m
v= 0 m/s
v² - u² =2gh
0² - u² = 2 ×10 × 1
-u² = 20
u = - 2√5 m/s
K.E. = 1/2 m u²
= 1/2×10×20
= 10 J
h = 100 cm = 1 m
v= 0 m/s
v² - u² =2gh
0² - u² = 2 ×10 × 1
-u² = 20
u = - 2√5 m/s
K.E. = 1/2 m u²
= 1/2×10×20
= 10 J
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