Hooke's Law

Front

What is Hooke's Law?

Back

Hooke's Law states that the force exerted by a spring is directly proportional to the amount it is stretched or compressed, as long as the elastic limit is not exceeded.

Front

What is the formula for Hooke's Law?

Back

F = k * x, where F is the force applied, k is the spring constant, and x is the extension of the spring.

Front

What is the unit of spring constant (k)?

Back

The unit of spring constant is Newtons per meter (N/m).

Front

What happens to a spring when it exceeds its elastic limit?

Back

When a spring exceeds its elastic limit, it will not return to its original shape and may become permanently deformed.

Front

What is the elastic limit?

Back

The elastic limit is the maximum extent to which a material can be stretched without permanent deformation.

Front

If a spring has a spring constant of 2.0 N/cm, what is its spring constant in N/m?

Back

The spring constant in N/m is 200 N/m (since 1 N/cm = 100 N/m).

Front

What is the relationship between force and extension in a spring that obeys Hooke's Law?

Back

The relationship is linear; as the force increases, the extension increases proportionally.

Front

How do you calculate the extension of a spring?

Back

The extension (x) can be calculated by rearranging Hooke's Law: x = F/k.

Front

What is the mass of an object that weighs 450 N on Earth?

Back

The mass is 45 kg (using the formula weight = mass * gravity, where gravity is approximately 10 N/kg).

Front

What does a graph of extension against force look like for a spring obeying Hooke's Law?

Back

The graph is a straight line starting from the origin, indicating a linear relationship.