IB Physics A.2 Forces and Momentum Questionbank

A mass is suspended by a rope and pulled sideways by a horizontal force until the rope makes an angle of $25^\circ$ to the vertical. Which of the following free-body diagrams best represents the forces acting on the mass?

An elevator containing a load accelerates downward at $2\ \text{m s}^{-2}$. If the mass of the load is $m$, what is the magnitude of the normal force acting on the load?

A car of mass $m$ is navigating a banked circular road of radius $r$ at a constant speed $v$. There is no friction between the tires and the road. What is the correct expression for the angle $\theta$ of banking that allows the car to stay on the road without slipping?

A boulder is pushed with a force of $400\ \mathrm{N}$ across a horizontal surface with a dynamic friction coefficient of $\mu_d = 0.25$. What is the maximum possible mass of the boulder?

A small raft is being towed on a pond by two horizontal cables. One cable applies a force of $50\text{ N}$ toward the South, while the second applies a force of $120\text{ N}$ toward the West. If the raft moves with constant velocity, what is the magnitude of the resultant resistive force on the raft?