Answer to Question #198055 in Quantum Mechanics for Yotamu

Question

a boy pulls a rope attatched to a sled with a force of 80.0 N. The

rope makes an angle of 30 degrees with the ground. compute the effective value of the pull tending to move the sled. a) along the ground b)lifting it vertcally

Answer 1

Force of pulling, $F=80\space N$

Angle with the horizontal, $\theta=30\degree$

Force along the ground = $F\cos\theta=80\cos30\degree=69.28\space N$

Force tending to lift it vertically = Force along y direction $=F\sin\theta$

$=80\sin30\degree=40\space N$