A neutron, one of the constituents of a nucleus, is found to pass two points `60` metres apart in a time interval of `1.8 xx 10^(-4) sec`. The mass of the neutron is `1.67 xx 10^(-27) kg`. Assuming that the speed is constant, its kinetic energy is

Options

A. `9.3 xx 10^(-17)` joule
B. `9.3 xx 10^(-14)` joule
C. `9.3 xx 10^(-21)` joule
D. `9.3 xx 10^(-11)` joule

Answer

A

Explanation

`KE = (1)/(2) mv^(2) = (1)/(2) m((s)/(t))^(2)`.