Search our library of homework questions

Top answers

All subjects

All levels

How do I use the conservation of linear momentum to solve problems?

The linear momentum of a particle is defined as the product between the particle’s velocity (a vector) and the particle’s mass (a scalar quantity):
p=m·v.
The l...

Answered by Ellis C. • Physics tutor

3106 Views

How does refraction work?

The fastest light can travel is when it is in a vacuum, where it travels at 3x10^8 metres per second.

However, when light travels through another substance or material (anothe...

Answered by Conor P. • Physics tutor

11331 Views

How do I use equations of motion ('suvat') to find a missing quantity?

First, be familiar with the equations of motion:s = displacementu = initial velocityv = final velocitya = acceleration (constant)t = time
v = u + ats = ((u+v)t)/2s = ut + (at^2)/2v^2 = u^2 + 2as

Answered by Jessica H. • Physics tutor

3678 Views

why does applying the brakes of a car cause the temperature of the breaks to increase?

The increase in heat is caused by friction between the brakes and the wheels. This work done between the brakes and the wheels, causes a decrease in kinetic energy ...

Answered by Hugo H. • Physics tutor

14410 Views

Why is the area of a triangle 1/2 * b * h?

This question is more easily answered with the help of multiple diagrams, but:1) Draw a rectangle, and draw a line between the top left corner and the bottom right corner. This line divides the rectangle ...

Answered by Tutor5499 D. • Maths tutor

4792 Views