12 results found for physics

View Grid List
Sort A-Z By date
00:09:00

Oscillations

by Joe Wolfe
Oscillations
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1608 views
Rating:

Inertia and restoring forces can, with low friction or damping, lead to oscillations and resonance. We analyse the mechanics of vibrations.

More details | Watch now
00:12:00

Gravity

by Joe Wolfe
Gravity
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1731 views
Rating:

The inverse square law explains planetary motion - and apples falling. Newton's law, measuring G, calculating orbits.

More details | Watch now
00:10:00

Rotation

by Joe Wolfe
Rotation
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1481 views
Rating:

Torques produce angular acceleration, moment of inertia 'resists' it. Rotational kinetic energy and angular momentum.

More details | Watch now
00:10:00

Momentum

by Joe Wolfe
Momentum
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1506 views
Rating:

p=mv. If external forces are zero, momentum is conserved. In collisions, energy may be conserved (elastic) or not (inelastic).

More details | Watch now
00:08:00

Centre of mass

by Joe Wolfe
Centre of mass
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1841 views
Rating:

In finite objects, the total external force equals the total mass times the acceleration of a point called the centre of mass.

More details | Watch now
00:10:00

Energy and power

by Joe Wolfe
Energy and power
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1451 views
Rating:

The total work done on an object equals the increase in its kinetic energy. For conservative forces, we can define potential energy.

More details | Watch now
00:10:00

Weight and contact forces

by Joe Wolfe
Weight and contact forces
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 1734 views
Rating:

Carefully distinguish mass and weight. Hooke's law quantifies deformation. Contact forces have normal and frictional components.

More details | Watch now
00:10:00

Newton’s laws of motion

by Joe Wolfe
Newton’s laws of motion
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 1415 views
Rating:

F=ma (laws 1&2). Forces come in pairs that add to zero (3). Newton's laws apply in inertial frames of reference. Some common approximations made in applying them.

More details | Watch now
00:08:00

Simple harmonic motion

by Joe Wolfe
Simple harmonic motion
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 1397 views
Rating:

In simple harmonic motion, displacement, velocity and acceleration vary sinusoidally with time, but with different phases.

More details | Watch now
00:08:00

Circular motion

by Joe Wolfe
Circular motion
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 1918 views
Rating:

Uniform circular motion: angular displacement and velocity are introduced and centripetal acceleration is determined.

More details | Watch now
00:09:00

Projectile motion

by Joe Wolfe
Projectile motion
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 1369 views
Rating:

Motion with uniform acceleration, such as in a uniform gravitational (or electric) field is projectile motion, analysed here with examples.

More details | Watch now
00:06:00

Motion with constant acceleration (kinematics)

by Joe Wolfe
Motion with constant acceleration (kinematics)
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 1733 views
Rating:

Kinematics quantifies motion without explaining the causes of it. Here we study accelerations that are zero, positive or negative.

More details | Watch now

Items per page: