Hooke's Law

Elastic potential energy is energy in an object that is compressed or __________.

• at rest

• stretched

• in equilibrium

What equation is used to calculate elastic potential energy?

• E_{p = m g h}

• E_{p = 1/2 k x}²

• E_{p = F / E d}

If extension = Stretched length - original length. What is the extension of spring D.

• mm

• mm

• mm

• mm

If F is force, k is spring constant and x is extension, Hooke's Law tells us that:

• F = k / x

• x = F . k

• k = F . x

• F = k . x

What is the best description of the relationship shown in this graph?

• In this graph, the relationship between force and extension is linear.

• In this graph, the relationship between force and extension is non-linear.

• In this graph, the relationship between force and extension is directly proportional.

• In this graph, there is no relationship between force and extension.

A stiff spring has a:

• high spring constant

• low spring constant

• spring constant of any value

• spring constant which is difficult to predict

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

• x = 4 cm

• x = 5 cm

• x = 3 m

• x = 3 cm

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

• k = 0.15 N/m

• k = 10 N/m

• k = 6.7 N/m

• k = 15 N/m

Which of the following springs is the stiffest?

• A spring that requires a froce 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.

A spring has a spring constant of 330 N/m. How far is the spring compressed if 150 N of force are used?

• x = 2.2 m

• x = 0.0014 m

• x = 5.0 m

• x = 0.45 m

Tags

NGSS.HS-PS2-1