A student pulls a 60.-newton sled with a force

having a magnitude of 20. newtons. What is the

magnitude of the force that the sled exerts on the

student?

(1) 20. N (3) 60. N

(2) 40. N (4) 80. N

20 N

Newtons third law states that any action (pulling the sled) has an equal and opposite reaction (the sled pulling back on you).

Think about pulling a sled on really slippery ice, you would pull yourself toward the sled just as much as the sled toward you.