A student burns about 300 food Calories during exercise

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Work Energy and Power · Work Energy and Power

Problem

A student burns about 300 food Calories during exercise. Assume

1\,\text{Cal}=4.2\,\text{kJ}

. If the student later pushes a lawn roller with a horizontal force of

200\,\text{N}

, the displacement required for the mechanical work done to equal the energy burned is closest to (a)

6.3\text{ m}

(b)

3150\text{ m}

(c)

6300\text{ m}

(d)

630\text{ m}