Exam Review. Semester 2, 2011. Find the force of an object when it hits the ground if it is dropped from 5 meters and has a mass of 5kg. F = m * a 5 x 9.8 = 49. Find the GPE of an object that weighs 65N and is at a height of 4m.
Semester 2, 2011
F = m * a
5 x 9.8 = 49
65 N x 4m = 260 Joules
35 kg x 9.8 x 40m = 13720 J
12 N forward
A = F/m
12/.4 = 30 m/s/s
This type of heat transfer can occur in a vacuum:
a) Conduction. c) Convection.
b) Radiation. d) Blackbody.
The fact that, in general, liquids and gases expand when heated, gives rise to
a) convection currents in fluids due to changing masses.
b) convection currents in fluids due to changing densities.
c) heat transfer by conduction.
d) convection currents in fluids due to constant temperatures.
Heat transfer by radiation
Heat energy always flows from
________ to _________
A ball falls from a height of 2 meters in the absence of air resistance.
The spring of a dart gun exerts a force on a dart as it is launched from an initial rest position.
Take your time.
See me to ask questions when you need to.
Make me proud!