Recent content by PhysicslyDSBL

Homework Statement I do not see how the two equations in each example are related, what should I do with them? (the l's are absolute value brackets): a) Let g(x) = 3x - 3 + l x+5 l. Find all values of a which satisfy the equation: g(a) = 2a +8 b) Let h(x) = l x l - 3x...

Homework Statement Eriks disabled boat is floating at a stationary location 3 miles East and 2 miles North of Kingston. A ferry leaves Kingston heading due East towards Edmonds at 12mph. Erik leaves the sailboat in a dingy heading due South at 10ft/sec (hoping to intercept the ferry)...

Homework Statement A block of mass mblock = 1.5 kg rests on a cart of mass mcart = 3.5 kg, which moves without friction on a horizontal surface. The coefficient of static friction between the block and the cart is µ = 0.7. The cart is accelerating to the right. a) What is the maximum...

Thanks for all the help everyone! After a few more calculations and substitutions I finally got the answer of 10N.

The other force would be the pulling force on both blocks. I am unsure about what to do with this. My book gives: F-T=m1a and T=m2a m1 and m2 seem to be backwards in this problem as the rope is connected between m1 and m2 [m2]------[m1]----- F=force (net force? 4.12) T=tension...

Thanks Tiny Tim! Maybe I have been staring at physics too long today 'cause I'm sure this is more obvious than it seems to me right now. So a=2.06, m=2 (the back block) which equals 4.12N. a does not equal 9.8 because this is the horizontal. It makes sense to me that the above...

Homework Statement A block of mass m1 = 2 kg and a block of mass m2 = 3 kg are tied together and are pulled from rest across the floor by a force of Fp = 25 N. The coefficient of friction of the blocks with the floor is µ = 0.3. a) What is the acceleration of the two blocks? Answer...

Blocks on Floor - I got it! Homework Statement A block of mass m1 = 2 kg and a block of mass m2 = 3 kg are tied together and are pulled from rest across the floor by a force of Fp = 25 N. The coefficient of friction of the blocks with the floor is µ = 0.3. (the blocks are being moved in the...

So the average speed at which the ball is moiving is the average rate. To calculate this I need to divide the distance by time. My attempt at finding time is: t = sqrt 2s/a s = 5.6 a = 9.81 the answer is t = 1.14 I then take this quantitiy to use: d/t = r d = 5.6 t =...

Homework Statement A 0.5 kg tennis ball is dropped from rest at a height of 5.6 m onto a hard floor. A flash photograph shows that the ball is compressed a maximum of 0.6 cm when it strikes the floor. b) Assuming that the acceleration of the ball is constant during its contact with the...

Thank you very much! These are the little mistakes I continually make and it is VERY helpful having a forum like this to help me get it all straight :redface: You rock!

Ok, I understand better what I did with the variables, I had the right numbers but not in the right places! After calculating using: a = 9.81 u = 0 s = 5.6 v= ? I get 2(9.81)(5.6) = 109.872 but this is not the final answer, I am unsure where to take this from here but I think it has...

Homework Statement A 0.5 kg tennis ball is dropped from rest at a height of 5.6 m onto a hard floor. Homework Equations a) What is the speed of the ball at the instant of contact with the floor? v = m/s The Attempt at a Solution I need acceleration and I have attempted using...

Thanks for the help! I got the correct answer of 388.08 N by taking the equation v^2=u^2 + 2as and solving for a and then multiplying by mass. Both of your suggestions were very helpful in helping me to understand these concepts better! :smile:

Homework Statement A bullet of mass 0.0022 kg initially moving at 504 m/s embeds itself in a large fixed piece of wood and travels 0.72 m before coming to rest. Assume that the acceleration of the bullet is constant. What force is exerted by the wood on the bullet? F=N Homework...