What is the average power developed by a motor as it lifts a
400.-kilogram mass at constant speed through a vertical
distance of 10.0 meters in 8.0 seconds?
320 W
Ob 500 W
oc 4,900 W
Od 32,000 W

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation

Identify the type of heat transfer occurring when chocolate melts in your hand