Survey

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts

Quantum vacuum thruster wikipedia , lookup

Force wikipedia , lookup

Eigenstate thermalization hypothesis wikipedia , lookup

Modified Newtonian dynamics wikipedia , lookup

Classical mechanics wikipedia , lookup

Internal energy wikipedia , lookup

Photon polarization wikipedia , lookup

Classical central-force problem wikipedia , lookup

Accretion disk wikipedia , lookup

Theoretical and experimental justification for the Schrödinger equation wikipedia , lookup

Buoyancy wikipedia , lookup

Kinetic energy wikipedia , lookup

Inertia wikipedia , lookup

Weight wikipedia , lookup

Momentum wikipedia , lookup

Work (thermodynamics) wikipedia , lookup

Relativistic angular momentum wikipedia , lookup

Gravity wikipedia , lookup

Newton's laws of motion wikipedia , lookup

Relativistic mechanics wikipedia , lookup

Transcript
What can we say about impact time during a collision?
What does the gravitational potential energy
(GPE) of an object depend on?
Work done (j) = force applied (N) x Distance moved (m)
Change in gravitational potential energy (j) = its weight (N) x its change of
height (m)
Change in gravitational potential energy (j) = mass (Kg) x gravitational field
strength (N/Kg) x change of height (m)
What happens when 2 vehicles collide?
What happens to GPE when an object is
moved up or down?
Kinetic energy (j) = ½ x mass (Kg) x speed2 (m/s2)
Momentum (kg m/s) = Mass (Kg) x Velocity (m/s)
What do we mean by work done?
Explain how seat belts work:
Explain how crumple zones work:
How can we work out if a car was speeding
before a car crash?
P2: Work, energy and momentum
1.
Calculate the work done when a force of 20N makes an
object move 4.8m in the direction of the force.
2.
A student of weight 450N steps on a box of height 0.20m
calculate the gain of GPE.
3.
An object of weight 2 N fired vertically upwards from a
catapult reaches a maximum height of 5m calculate the
KE of the object when it left the catapult.
4.
Calculate the momentum of an 80Kg rugby player
running at a velocity of 5 m/s.
What does the kinetic energy (KE) of an object depend on?
What happens to the work done to overcome friction?
What is momentum?
What does the law of conservation of momentum state?