IG Phy – Forces (II)

When the aircraft lands, it primarily relies on reverse thrust to slow down.

The extension of a spring is directly proportional to the load applied to it within its elastic limit.

If the limit of proportionality is exceeded, the spring will return to its original shape after the load is removed.

The spring constant k can be determined from the gradient of the linear section of a load-extension graph.

Hooke\’s Law is only valid within the elastic limit of the material.

The units of the spring constant k are N/m, N/cm, or N/mm.

The extension of a spring is inversely proportional to the load applied.

The area under a load-extension graph represents the work done in stretching the spring.

A material reaches its limit of proportionality before it reaches its elastic limit.

The extension of a wire is the difference between its original length and its length after the load is applied.

A stiff spring has a higher spring constant k than a less stiff spring.

If a spring stretches 2 cm under a load of 4 N, the spring constant is 2 N/cm.

A graph of load against extension for a spring is always a straight line.