Physics · Unit 2 · Linear motion and force · Linear motion
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A kayaker paddles upstream in a river with a steady current. The kayak moves forward at constant velocity. Identify the forces acting on the kayak and classify each force as contact or non-contact.
A box of mass 15 kg rests on a horizontal table. A student pushes the box horizontally with a force of 40 N, but the box does not move. Identify the two forces acting on the box in the horizontal direction.
A cyclist rides along a flat road at constant velocity. She then applies the brakes and comes to rest. Identify all forces acting on the cyclist–bicycle system during the braking phase and describe the direction of each force.
A 0.50 kg toy car accelerates uniformly from rest along a horizontal track. A data logger records the applied force and produces the graph shown below. Identify the applied force at t = 2.0 s.