Formulas

Question 1

Weight

Answer 1

W (weight(N)) = m (mass(kg)) * g (gravitational field strength(N/kg))

Question 2

Hooke’s Law

Answer 2

F (force(N)) = k (spring constant(N/m)) * e (extension(m))

Question 3

Gravitational Potential Energy

Answer 3

Ep (gravitational potential energy(J)) = m (mass(kg)) * g (gravitational field strength(N/kg)) * h (height(m))

Question 4

Kinetic Energy

Answer 4

Ek (kinetic energy(J)) = (m (mass(kg)) * v² (speed or velocity(m/s))) / 2

Question 5

Elastic Potential Energy

Answer 5

Ee (elastic potential energy(J)) = k (spring constant(N/m)) * e² (extension(m))) / 2

Question 6

Power 1

Answer 6

P (power(W)) = E (energy transferred(J)) / t (time elapsed(s))

Question 7

Power 2

Answer 7

P (power(W)) = W (work done(J)) / t (time elapsed(s))

Question 8

Efficiency

Answer 8

Efficiency (%) = (Useful Energy Output (J) / Total Energy Input (J)) * 100

Question 9

Speed or Velocity

Answer 9

v (speed or velocity(m/s)) = s (distance or displacement(m)) / t (time(s))

Question 10

Acceleration

Answer 10

a (acceleration(m/s²) = (v (final velocity(m/s)) - u (initial velocity(m/s))) / t (time(s))

Question 11

Work Done

Answer 11

W (Work Done(J)) = F (force(N)) * s (Distance(m))