A. 0.5 m/s
B. 2.0 m/s
C. 8.0 m/s
D. 32.0 m/s
E. 128.0 m/s

Correct Answer:

Option C – 8.0 m/s

Explanation

F = m(v – u)/t;

(v – u) = Ft/m

= 8.0 m/s

SEE ALSO  A boy walks away from a plane mirror at a speed of 3 ms-1 in a direction normal to the surface of the mirror. At what speed is his image approaching him?

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