Which products do you think required scientific knowledge to develop? Check all that apply.

_ a flashlight
_ a cell phone
_ a hair dryer
_ eyeglasses
_ a microwave
_ a household cleaner

Which feature indicates that mars resides in the inner region of the solar system

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine