A crate is lifted vertically upward at constant speed

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

Problem

5.0\,\text{kg}

crate is lifted vertically upward

2.0\,\text{m}

at constant speed. What is the change in the crate’s gravitational potential energy

\Delta U_g

during the lift? (Use

g = 9.8\,\text{m/s}^2

.) (a)

+98\,\text{J}

(b)

-98\,\text{J}

(c)

+49\,\text{J}

(d)

+196\,\text{J}