Work Practice Test

In a mechanics lab, a $5.0,\text{kg}$ block is pulled across a frictionless horizontal track by a constant force of magnitude $F=18,\text{N}$ applied at an angle $\theta=25^\circ$ above the horizontal. The block moves a horizontal displacement of $d=4.0,\text{m}$. Based on the scenario described above, how much work is done by the force in pulling the object? Use $W=Fd\cos(\theta)$.

A constant force $F=15,\text{N}$ pulls a dynamics cart on a frictionless horizontal surface through a displacement $d=10,\text{m}$. The force is directed $\theta=90^\circ$ relative to the displacement (perpendicular). Based on the scenario described above, how much work is done by the force in pulling the object? Use $W=Fd\cos(\theta)$.