Work, Energy, Power (Leaving Cert Applied Maths): Flashcards

$W = F \times d$

Joules (J)

Movement in direction of applied force

$P = \frac{W}{t}$

$P = F \times v$

Watts (W)

$I = mv - mu$

Newton seconds (Ns)

$KE = \frac{1}{2}mv^2$

$PE = mgh$

Quadruples the kinetic energy

Energy cannot be created or destroyed

$m_1u_1 + m_2u_2 = m_1v_1 + m_2v_2$

Drag force balances driving force, acceleration is zero

$D = kv^n$