Elastic objects

Question 1

By stretching a spring, describe the forces involved:

Answer 1

There needs to be two opposing forces on the spring, for example a weight pulling it down and a clam holding it in place.

Question 2

What does it mean if a spring is in equilibrium?

Answer 2

That a spring has two equal opposite forces acting on it.

Question 3

To compress, stretch and bend what forces are needed?

Answer 3

Two forces.

Question 4

What is inelastic deformation?

Answer 4

When an object doesn’t return to its original shape after being stretched, compressed, bent.

Question 5

What is elastic deformation?

Answer 5

When an object returns to its original shape after forces have been applied to it.

Question 6

What happens when a spring doesn’t return to its original shape?

Answer 6

The limit of proportionality has been exceeded.

Question 7

What formula links force, extension and spring constant?

Answer 7

Force (N)= spring constant (N/m) x extension (m)

Question 8

What is the formula for elastic potential energy?

Answer 8

1/2 x k x e (squared)

Question 9

What is Hooke’s law?

Answer 9

When the force applied to an object is directly proportional to the extension of the object, as long as the limit of proportionality isn’t exceeded.