In terms of action-reaction force pairs, explain why it is important to use helmets, elbow pads, knee pads and other protective clothing while using skateboards or in-line skates

Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

The a992 steel rod bc has a diameter of 50 mm and is used as a strut to support the beam. determine the maximum intensity w of the uniform distributed load that can be applied to the beam without risk of causing the strut to buckle. take f.s. = 2 against bucklin