1) How might the shape of an object change if forces act away from each other in a straight line? a) It might extend b) It might compress c) It might bend 2) How might the shape of an object change of forces act towards it in a straight line? a) It might extend b) It might compress c) It might bend 3) Which word describes an object that will return to its original shape when forces are removed? a) plastic b) inelastic c) elastic 4) Which word describes an object that will not return to its original shape when forces are removed? a) linear b) inelastic c) elastic 5) What is another name for the limit of proportionality? a) plastic limit b) elastic limit c) inelastic limit 6) What is the unit for the spring constant? a) Newton-meters b) Newtons per square meter c) Newtons per meter 7) What is the name for energy stored by a stretched spring? a) Elastic potential energy b) Gravitational potential energy c) Kinetic energy 8) Which equation gives the energy stored by a stretched spring? a) E e = k e b) E e = 1/2 k 2 e c) E e = 1/2 k e 2 9) A spring extends elastically by 10cm when a force of 20N is applied to it. What force would be needed to extend the spring by 5 cm? a) 40N b) 10N c) 5N 10) A spring extends elastically by 0.1m when a force of 2N is applied. What is the value of its spring constant? a) 0.2 N/m b) 0.05 N/m c) 20 N/m

Forces and Elasticity

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