Acar a is going north east at 80kmph& another car b is going south east with velocity of 60kmph .the velocity of a relative to b makes an angle with north =?

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *

You are given two vectors a⃗ =−3.00ι^ 5.00j^ and b⃗ =5.00ι^ 2.00j^. let the counterclockwise angles be positive.

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?