Unit 3 · Dynamics
15 randomly selected questions from a bank of 60 · one attempt · 15 minutes on the clock.
Student Learning Outcomes covered
- Define momentum with its S.I. unit; calculate momentum using p = mv
- Define the law of conservation of momentum and apply it to collisions between two objects
- Solve problems using Force = change in momentum / change in time (impulse)
- Identify safety devices (packaging of fragile objects, crumple zones, seatbelts) that reduce the effects of changing momentum
- State Newton's laws of motion
- Distinguish between mass and weight; solve problems using F = ma and w = mg
- Explain the forces acting on a body moving on a curved path
- Calculate centripetal force on a body moving along a circular path using Fc = mv²/r
- Define friction; explain its effect on vehicle motion — tyre surface, road conditions, skidding, braking force
- Identify the relationship between load and friction, and demonstrate that rolling friction is much lesser than sliding friction
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