Two power lines, each 280 m in length, run parallel to each other with a separation of 35 cm. If the lines carry antiparallel currents of 140 A, what is the magnitude and direction of the magnetic force each exerts on the other? Magnitude N
Direction (choices are towards eachother and away from eachother)

In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory 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^.