How might the shape of an object change if forces act away from each other in a straight line?
It might extend
It might compress
It might bend
How might the shape of an object change if forces act towards each other in a straight line?
Which statement best describes Hooke’s law?
The extension of a spring is directly proportional to the force applied
The extension of a spring is directly proportional to the force applied, provided that the limit of proportionality is not exceeded
The extension of a spring is inversely proportional to the force applied, provided that the limit of proportionality is not exceeded
What is the shape of a Force-Extension graph for a spring if it obeys Hooke’s law?
A straight line
A straight line through the origin
An upward curve
What is the spring constant a measure of?
The extension of a spring
The length of a spring
The stiffness of a spring
What is the unit for the spring constant?
Newton metre (Nm)
Newton per metre squared (N/m2)
Newton per metre (N/m)
How is the spring constant found from a Force-extension graph?
It is read from the horizontal (x) axis
It is the gradient of the line
It is the area under the line
What is the name for energy stored by a stretched spring?
Elastic potential energy
Gravitational potential energy
Kinetic energy
A spring extends elastically by 10 cm when a force of 20 N is applied to it. What force would be needed to extend the spring by 5 cm?
40 N
10 N
5 N
A spring extends elastically by 10 cm when a force of 2 N is applied. What is the value of the spring constant?
0.2 N/m
2 N/m
20 N/m