Forces, Hooke's Law

Front

Hooke's Law: If F is force, k is spring constant, and x is extension, what is the relationship?

Back

F=kx

Front

A spring has a spring constant of 5N/cm. What is its extension when loaded with 15N?

Back

3cm

Front

A spring extends 1.5m under load 10N. What is its spring constant?

Back

6.7N/m

Front

Which spring is the stiffest? Options: A spring that requires a force of 2000 N to compress it by 6.8 m, a spring that requires a force of 4000 N to stretch it by 9.0 m, a spring that requires a force of 8000 N to compress it by 45 m, a spring that requires a force of 4800 N to stretch it by 14 m.

Back

A spring that requires a force of 4000 N to stretch it by 9.0 m.

Front

A 25,000 N Car is supported by 4 springs. If each spring is deflected by 0.040 m, what is the spring constant?

Back

160,000 N /m

Front

Which statement most accurately represents Hooke's Law?

Back

Extension of a spring is proportional to the force applied.

Front

Units for Force?

Back

N

Front

Spring constant is measured in

Back

N/m

Front

When two objects are in contact with each other, their forces are...

Back

Equal in magnitude and opposite in direction

Front

Frictional force on a 25-N object sliding at constant speed with a coefficient of kinetic friction of 0.40?

Back

10 N