Extra

Question 0

Units for newtons?

Answer 0

kgms^-2

Question 1

Units for joules?

Answer 1

Nm

Question 2

When asked to draw a velocity vector, what do you need to remember?

Answer 2

The LENGTH of the vector is important

Question 3

State the principle of conservation of energy?

Answer 3

Total initial energy = total final energy

Energy can not be created or destroyed, can only be transferred into other forms

Question 4

What does hookes law state?

Answer 4

The extension produced in an object is proportional to the force producing it, providing the elastic limit is not exceeded (STRAIGHT LINE GRAPH).

Question 5

On a force(y) against length(x) graph for a spring, how do you find out the work done on the spring?

Answer 5

AREA UNDER THE GRAPH

0.5Fx

Question 6

When carrying out a Young’s modulus experiment on a piece of metal wire, what measurements and equipment should be taken and used?

Answer 6

MEASUREMENTS: diameter of wire
Initial length of wire
Extension of wire each test
Weight/mass added
EQUIPMENT: micrometer for wire diameter
Ruler
Scales

Question 7

What is the young modulus an indication of?

Answer 7

The stiffness of a material.

Question 8

What is a brittle material?

Answer 8

A material that breaks beyond its elastic limit.

Question 9

What is a ductile material?

Answer 9

A material that becomes permanently deformed after going beyond its elastic limit.

Question 10

Force =

Answer 10

Change in momentum/change in time