1) What does a force do to a solid object? a) Changes its color b) Increases its mass c) Increases its temperature d) Changes its size or shape 2) Which is an example of compression? a) Pushing a sponge b) Stretching a rope c) Twisting a towel d) Pulling a spring 3) Which object is easiest to deform? a) Steel bar b) Foam rubber c) Glass rod d) Plastic bottle 4) When an object returns to its original shape, the deformation is... a) Permanent b) Elastic c) Inelastic d) Plastic 5) What happens in an inelastic deformation? a) The object does not return to original shape b) The object returns to its original shape c) The object shrinks d) The object vibrates 6) What is the increase in length of a spring called? a) Compression b) Extension c) Deformation d) Tension 7) A spring stretches from 20 cm to 26 cm. What is the extension? a) 4 cm b) 6 cm c) 2 cm d) 26 cm 8) If a spring goes back to its shape after being stretched, it shows... a) Plastic deformation b) Elastic behavior c) Inelastic behavior d) Permanent stretching 9) What is Hooke’s Law formula? a) F = m × a b) F = k × x c) F = k ÷ x d) F = k + x 10) 10. A spring with constant 2 N/cm stretches 3 cm. What is the force? a) 5 N b) 6 N c) 4 N d) 3 N

Forces Acting on Solids

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