Recent content by pharm89

Homework Statement Hi,I am taking a grade 11 physics correspondance course and I have been stumped for the last few weeks on what they are asking in a particular question. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start...

Thanks..I guess I need to break down the question into different parts. -exploring the law of conservation of energy This law states that the total amount of energy in the universe remains constant. discover all forms of energy in the question: -Thermal energy - converted in the sandbag...

Thanks for the help. The question makes much more sense now. There are two other parts to that question which are theory based. They are: b) Explain 1 application of the first law of thermodynamics in this example. My answer: Energy both enters and leaves this system. The thermal...

True, of course that would not be right:))) Thanks for the tips. The collision of the bullet and the sandbag 1/2(0.015 kg) (840m/s)^2 = 1/2 (0.015kg) (705600) =5292 J The rising of the bullet and sandbag Emechanical = mgh =(0.015 kg (bullet) + 24 kg (sandbag))(9.8m/s^2)(0.8m)...

Thanks for the help. Am I understanding the question any better. I tried the problem again and did calculations for both parts. 1. the collision of the bullet and the sandbag Mechanical Energy - Ek + eg = Eh since h = 0 1/2 (0.015 kg) (840 m/s) =1/2 (12.6) = 6.3 J 2. The rising...

Homework Statement Hi I am taking a self study physics course and not sure about the following question. Any help would be much appreciated. Thanks 1. A 15.0 g bullet is fired at 840 m/s into a ballistic pendulum consisting of a 24.0 kg bag of sand. If the bag rises to a height of...

Thank you. E thermal = 67.6 J + 3600 J (amount of work done) =3667.6 J

Homework Statement Hi, I am taking a physics correspondace course and wondering if I am interpreting these questions correctly. Thanks Homework Equations 1. a) A force of 24 N is used to push a smooth box 3.6 m across a smooth floor. What is the final kinetic energy of the box? b)...

Thanks for the help. therefore the conditions for work are met. g= 46kg X 9.8 N =450.8 N W=450.8 N X 6.2 m W=2794.96 J = 2795 J

whoops question c and d (c) A 46 kg woman climbs a flight of stairs, 6.2 m high. How much work does she do. (d) A force of 104 N is applied to a 26 kg mass at an angle of 32 degrees to the horizontal. Calculate the work done when the mass is moved through a horizontal distance of 5.0m...

Homework Statement Hi I am taking a grade 11 physics correspondance course and would like to know if iam on the right track. thanks in advance. 1. (a) A force of 280 N is required to push a box 8.2 m across a rough floor. How much work is done? (b) Explain 1 transformation of...

thanks very much for your comments Pharm89

Homework Statement I am responsible for coming up with an experiment to determine how the following 3 factors affect the force of friction: weight, surface area and speed. The directions given inlcude: "You will need to measure the magnitude of the force of friction. Since the...

Thanks for your help with this problem. It makes more sense to me know. Pharm89

i substituted 9.8 m/s^2 for F_net, still using the same varibles for mass and acceleration and solved for X. and Icame up with 0.51 N? Or is my method simply wrong. Thanks Pharm89