Aperson began running due east and covered 15 km in 2.0 hr. what is the average velocity of the person? show all your work!

Which statement correctly describes the relationship between frequency and wavelength?

The heliocentric and the geocentric models of the solar system included these central principles

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^.