Periodic motion

If 'F' is force, 'K' is spring constant and 'x' is the extension, Hookes law states that:

• F = K/x

• F = -Kx

• F = -x/K

• x = FK

In the force displacement graph, the slope represents

• Extension

• Potential Energy

• Spring constant

• Amplitude

The area under the graph for a force-displacement graph represents the

• Kinetic energy

• Potential energy

• Gravitational force

• spring constant

Which spring has the greater spring constant?

• A

• B

• Both have equal spring constants

• None

If a large force stretches a spring only to a very small extension, it means the spring constant is

• large

• small

• None

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

• 4cm

• 5 cm

• 3m

• 3 cm

A spring stretches 0.12m when some apples are suspended from it as shown in the figure.What is the spring constant?

• 32 N/m

• 30 N/m

• 0.038 N/m

• 26.7 N/m