Flashcards
WJEC Mechanics 1 - Key Facts
Flashcards do conjunto (19)
- 1Which SUVAT equation does not involve \(s\)?\[v=u+at\]
- 2Which SUVAT equation does not involve \(u\)?\[s=vt-\frac{1}{2}at^2\]
- 3Which SUVAT equation does not involve \(v\)?\[s=ut+\frac{1}{2}at^2\]
- 4Which SUVAT equation does not involve \(a\)?\[s=\frac{1}{2}(u+v)t\]
- 5Which SUVAT equation does not involve \(t\)?\[v^2=u^2+2as\]
- 6Which formula comes from Newton's Second Law?\[F=ma\]
Note: \(F\) represents the resultant force - 7Formula for the momentum of an object, mass \(m\), moving with velocity \(v\)?\[mv\]
- 8Formula for Impulse?\[I=mv-mu\]
or
\[I=Ft\](this second formula is very rarely needed) - 9Area under a velocity-time graph gives...?Displacement
- 10Gradient of a velocity-time graph gives...?Acceleration
- 11Gradient of a displacement-time graph gives...?Velocity
- 12The SUVAT equations only work for constant _____________ ?Acceleration
- 13If an object is moving, or on the point of moving, what do we know about friction?\[F_r=\mu R\]
- 14If an object is in equilibrium and NOT on the point of moving, what do we know about friction?\[F_r < \mu R\]
- 15Formula for the coefficient of restitution, \(e\)?\[e=\frac{v_2-v_1}{u_1-u_2}\]
- 16Formula for the moment of a force about a point?\[\text{Force}\times \text{distance}\]
In this formula, 'distance' is the perpendicular distance from the line of action of the force to the point. - 17How would you find the centre of mass of a triangle?Find the mean of the coordinates of the triangle's vertices
OR
\(\frac{2}{3}\) along median from vertex - 18Formula for the coefficient of restitution between an object and a plane surface (such as a wall or the ground)\[e=\frac{\text{speed of rebound}}{\text{speed of approach}}\]
- 19What is the principle of conservation of momentum?Total momentum before impact equals total momentum after impact
Informações
- Descrição
- Key points and important formulae for the WJEC GCE Maths M1 module
- Criado por
- Daniel Cox
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