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15 Cards in this Set

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Acceleration=

A (m/s squared)= change in in velocity (m/s)


__________________________


time taken (s)

Average speed=

Average speed (m/s)= distance (m)


_____________


time (s)

Speed-time graphs...



Acceleration=



Distance=

Speed-time graphs...



Acceleration= gradient



Distance= area under graph line

Weight=

Weight= mass x gravitational field strength



W=mg

What does Newton's 1st law state?

Newton's 1st law states that an object continue to move at constant speed and in a straight line if there is no resultant force

Force=



(Newton's 2nd law)

Force= mass x acceleration



F= ma

What is a force acting towards the centre called?



Equation for centripetal force=

A centripetal force



F= mv squared


_____________


r

What is speed?



What is velocity?

Speed is a scalar quantity that refers to how fast an object is moving



Velocity is a vector quantity which is speed in a certain direction; it magnitude and direction.

Explain terminal velocity

Terminal velocity happens at the moment in time that the force, is the same as the opposite force of air resistance or friction. In other words, terminal velocity is the point at which the velocity (speed of change of the falling object) is no longer getting greater. The gravitational force minus the force of drag (or air resistance) equals zero.

What is work done?



Work done=

Work done is the name for a transfer of energy.



work done (J) = force (N) x distance (m)

Define power


Power is the rate of doing work


Power=

Power= energy


_______


time

Describe the energy transfers of an object going downhill

Gravitational potential energy (GPE) ----> Kinetic energy (KE)

Kinetic energy (KE)=

KE= mass x velocity squared


________________________


2

Gravitational potential energy (GPE)

GPE= mass x gravitational field strength x height