A 6-m-long, 490 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 75 kg construction worker stands at the far end of the beam. What is the net torque on the beam

Can you match these to the correct definition

Avector of magnitude 2 cannot be added to a vector of magnitude 3 so that the magnitude of the resultant is a. zero b. 1 c. 3 d. 5 e. 7

The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?