How much work is done by a person who pushes a lawnmower with a force of 50n at a distance of 450m?

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?