Question

0.5 kg ball is at the top of a ramp which is 8 meters high. How much kinetic energy does the ball have at the bottom of the ramp?

A. 4 J

B. 10 J

C. 40 J

D. 400 J

Answer 1

40 J

Step-by-step explanation:

first let find velocity

from law of conservation of energy

`√(2gh) = v`

`√(2(10)(8)) = v`

`\\ 12.6 = v`

`k.e = (1)/(2) mv {}^(2)`

approximately 40J (value of g is 9.8 but here it is 10)