Bennett Mechanical Test Springs and Elasticity

Question 1

According to Hooke's Law, when the force applied to a spring is doubled, what happens to its extension?

Accepted Answer

It doubles

Answer

It stays the same

Answer

It quadruples

Answer

It halves

Question 2

A spring has a spring constant of 50 N/m. How much force is needed to stretch it 0.2 meters?

Accepted Answer

10 N

Answer

250 N

Answer

0.004 N

Answer

100 N

Question 3

Two identical springs connected in series (end to end) will have what effective spring constant compared to one spring?

Accepted Answer

Half as stiff

Answer

Twice as stiff

Answer

Four times as stiff

Answer

The same stiffness

Question 4

What is the SI unit of the spring constant?

Accepted Answer

Newtons per meter (N/m)

Answer

Newtons (N)

Answer

Joules (J)

Answer

Meters per Newton (m/N)

Question 5

Which material property describes a material's ability to return to its original shape after being deformed?

Accepted Answer

Elasticity

Answer

Plasticity

Answer

Ductility

Answer

Brittleness

Question 6

The elastic potential energy stored in a spring with spring constant k compressed by distance x is:

Accepted Answer

½kx²

Answer

kx

Answer

kx²

Answer

2kx

Question 7

When two identical springs are connected in parallel (side by side, sharing the same endpoints), the effective spring constant is:

Accepted Answer

Twice the single spring constant

Answer

Half the single spring constant

Answer

The same as a single spring

Answer

Four times the single spring constant