Why is radiation often used to destroy cancer cells ?

a) radiation only targets cancer cells, not healthy cells.

b) radiation is a tracer that pick out cancer cells to destroy.

c) because cancer cells divide more quickly than normal cells, they are very susceptible to radiation.

d) radiation is the only defense that people have to fight cancer.

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^.