13 results found for ,mechanics

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centre-of-mass 00:08:00

Centre of mass

by Joe Wolfe
Centre of mass
for 14-19 and upwards,
Lectures | 14-19 and upwards | 9 years ago | 859 views
Rating:

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

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circular-motion 00:08:00

Circular motion

by Joe Wolfe
Circular motion
for 14-19 and upwards,
Lectures | 14-19 and upwards | 10 years ago | 1227 views
Rating:

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

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energy-and-power 00:10:00

Energy and power

by Joe Wolfe
Energy and power
for 14-19 and upwards,
Lectures | 14-19 and upwards | 9 years ago | 785 views
Rating:

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

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gravitation 00:12:00

Gravity

by Joe Wolfe
Gravity
for 14-19 and upwards,
Lectures | 14-19 and upwards | 9 years ago | 907 views
Rating:

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

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Sharman 00:29:00

Life in Space

by Helen Sharman
Life in Space
for 14-19 and upwards,
Discussions | 14-19 and upwards | 10 years ago | 928 views
Rating:

Helen Sharman, the UK's first astronaut, gives a vibrant account of her personal experience of life in space using models and film to illustrate the key scientific concepts involved in spaceflight. Among other things she discusses the way Newton's Th....

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momentum 00:10:00

Momentum

by Joe Wolfe
Momentum
for 14-19 and upwards,
Lectures | 14-19 and upwards | 9 years ago | 801 views
Rating:

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

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motion-with-constan-acceleration-kinematics 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 | 10 years ago | 1055 views
Rating:

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

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newtons-laws 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 | 10 years ago | 836 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.

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oscillations 00:09:00

Oscillations

by Joe Wolfe
Oscillations
for 14-19 and upwards,
Lectures | 14-19 and upwards | 8 years ago | 748 views
Rating:

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

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projectile-motion 00:09:00

Projectile motion

by Joe Wolfe
Projectile motion
for 14-19 and upwards,
Lectures | 14-19 and upwards | 10 years ago | 720 views
Rating:

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

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rotation 00:10:00

Rotation

by Joe Wolfe
Rotation
for 14-19 and upwards,
Lectures | 14-19 and upwards | 9 years ago | 776 views
Rating:

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

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simple-harmonic-motion 00:08:00

Simple harmonic motion

by Joe Wolfe
Simple harmonic motion
for 14-19 and upwards,
Lectures | 14-19 and upwards | 10 years ago | 795 views
Rating:

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

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