4.2: Contact Forces
Quiz by Macie Morris
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10 questions
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- Q1What is the contact force that opposes motion between two surfaces?Frictional forceNormal forceTension forceGravitational force30s
- Q2What is the contact force exerted by a stretched or compressed object?Gravitational forceElastic forceFrictional forceNormal force30s
- Q3Which contact force arises between two objects in contact and depends on the roughness of their surfaces?Normal forceElectromagnetic forceFrictional forceGravitational force30s
- Q4What is the SI unit of force?JouleNewtonAmpereWatt30s
- Q5Which of the following factors does NOT affect frictional force?surface roughnesstemperaturetype of materialweight of an object30s
- Q6Which of the following statements about frictional force is true?Frictional force has no effect on motionFrictional force sometimes opposes motionFrictional force always opposes motionFrictional force always increases motion30s
- Q7Which of the following surfaces would generally have a higher coefficient of friction?smooth surfacerough surfaceoily surfacewet surface30s
- Q8Which of the following statements is true about elastic force?Elastic force only acts on solid objects.Elastic force is always in the opposite direction of the displacement.Elastic force restores an object to its original shape or position.Elastic force causes objects to permanently deform.30s
- Q9Which of the following is an example of a contact force?FrictionMagnetismElectricityGravity30s
- Q10What is the relationship between force and motion?Motion causes forceForce and motion are interchangeableForce and motion are unrelatedForce causes motion30s