PS TEST 3: Energy and Heat S2

What is the equation for speed?

• S = D/t

• S = D x t

• S = t x D

• S = t / D

Acceleration equation?

• a= v_f - v_i / t

• a = F / m

• none of the above

Force or weight equation?

• F= m . a

• w = m . g

• none of the above

Work equation?

• W= F . d

• W = m . g

• W = F / t

• none of the above

power equation?

• Power = Work /time

• Power = Work /temperature

• Power = Weight/time

• none of these

momentum equation?

HINT: Kg m/s

• p = m . V

• P = W/t

• P = I. V

• None

Total mechanical Energy equation?

• TME = Potential Energy + Kinetic Energy

• TME = Power + momentum

Gravity is a constant used to find the weight of an object. using the equation Weight = m . g. If you have 20 Kg as the mass of the object, what number do you use for gravity?

• 9.8 m/s²

• 9.8 m/s

• 9.8 m

• 0 m/s²

True or False:

Kinetic Energy =  $\frac{1}{2}m\ .\ v^2$  Joules
Potential Energy =  $m.g.h$  Joules 

• True

• False

________energy is stored in a spring.

• Elastic Potential

• Kinetic

• Gravitational Potential