Homework Help

For #15 of the Dynamics part of the AP style problems, why can't we use mgsin instead of Normal force, AND why can't we use mgcos for Normal force - why do we have to derive another one.

how do you get answer to which unit is equivalent to a newton per kilogram the answer is m/s2 How

For the kinematics test your understanding question 5: an object is dropped from a given height h at the same time an identical object is launched vertically upward from the ground determine the initial velocity of the object launched upward such that the two objects collide at h/2, how do you solve this?

In the AP Physics I Essentials book, I'm a little bit stuck on question 5 for Chapter 7 Test Your Understanding. The problem states "A marble is rolled separately down two different inclines of the same height as shown below. Compare the speed of the marble at the bottom of incline A to the speed of the marble at the bottom of incline B. Compare the time it takes the marble to reach the bottom of incline A to the time it takes to reach the bottom of incline B." There is also a picture with a ball on top of an incline that is straight, and another picture with a ball on top of an incline that is curved. I can explain why incline B would result in greater speed resulti…

I am having trouble solving part (e) of question 13 in the Kinematics section of the Appendix for AP Physics 1 Essentials. I got parts a-d, but must be missing something to solve for the height. Thanks!

Hey help plz . I tried solving it cant get it so far ....

I was given the question in Physics class, why does the beginning of this scene defy phycis. The part where they are shooting down the bug. Please need help because I have no clue. Something to do with Newtons Laws?

Why donot the images ulpoad? Taking a picture and posting it here us more easy than typing the whole question .... I have a lot of questions to ask. Plz recommend me some effective method

Car pulls trailer of mass 500 kg . The friction acting on the car is 1200 n and that on the trailer is 400 N . At first the acc of the car and trailer system is 2 m/s^2 What is the tension In coupling btw the car and the trailer for this acc?

Hi i will soon be loosing my internet provider. I am looking for DVD's that would be a good high school physics course. Can anyone provide suggestions.. Thanks Gretch

The book says the answer is 1.73 v, but my teacher gave a bunch of variables when he solved it.

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A ball has an intial velocity of 1.30m/s along the +y-axis and starting at t(o), receives an acceleration of 2.10m/s^2 in the x- direction.(a) what is the position of the ball 2.50 s after t(o). b. What is the velocity of the ball at the time ?

Air resistance acting on a falling body can be taken into account by the approximate relation for the acceleration a = (dv/dt) = g-kv, where k is a constant. Derive a formula for the velocity of the body as a function of time assuming it starts at rest.(a=0, t=0) How do you integrate g-kv? Do you need a u substitution?

Mostly to Mr. Fullerton: Can i put all my notes together when i hand in my homework tomorrow? If they are all on the same pages is that okay?

I need help with these questions please.

Hi, I have a question. Electric current in the circuit according to the relation I=1-10cos(50t). Determine the time when the Q=0 C. I used: I =dQ/dt Q(t) = ∫ Idt = ∫(1-10cos(50t))dt = t - (10/50)sin(50t) + C = t - 0.2sin(50t) + C But what now ? I donť known how can i calculate the time... Someone told me that i must find the interval of definite integral... from t=0 to t=?.... Thank you for reply.

A body is projected downward at an angle of 30 degrees to the horizontal from the top of a building 170m high. It's initial speed is 40m/s. a) How long will it take before striking the ground? How far from the foot of the building will it strike? c) At what angle with the horizontal will it strike?

IMG.pdf For sharing... Anyone could solve them all with appropriate explanation? Most preferable when is with Physics Law and all other concepts.Thank you and have a nice day! IMG.pdf IMG.pdf IMG.pdf IMG.pdf IMG.pdf

hello! I am a high school student (grade 12) and i study physics but i could not solve one of the questions... i searched up on internet but could not find it.. the question is this, "a Basketball with diameter of 24.2 cm is dropped from 76cm from the ground with spin at 5 revolution/sec, the coefficient of friction is 0.5 and the time of the ball in contact wit the ground is 0.1 second. Calculate the angle and velocity it bounced off at and hence find the maximum height and the distance it traveled from the first bounce to second bounce." my teacher said its got to do with impulse, friction, torque,and angular moment... i kind of get the concept of it but i dont really k…

Hello, I got to this question and was not sure how to go about it. I sorta had an idea but that was for the line charge of a fixed length, so do I just ignore the lengths and assume that E= lamda/(4 pi e0) and then use V=int(E*dl)?

Hi, For the following question: A 1.37-kg fish is hung from a vertical spring scale with a force constant of 5.20x10² N/m. The spring obeys Hooke’s Law. (a) By how much does the spring stretch if it stretches slowly to a new equilibrium position? ( If the fish is attached to the un-stretched spring scale and allowed to fall, what is the net force on the fish when it has fallen 1.59 cm? © Determine the acceleration of the fish after it has fallen 2.05 cm. http://www.dpcdsb.org/NR/rdonlyres/70ACCCCE-D6A6-44CA-982F-8E319A8ADE82/89746/momentumenergyquestions.pdf (the solution is posted here). I was wondering why you have to use forces to solve(kx) rather than the…

Hello, So the formula my teacher gave me to solve for constructive and destructive interference of light is d(Xm/L)=(m-1/2)lambda (destructive formula) where m must be a whole number. Is "m" the nodal line number from the central bright? So for this problem, 638nm light is shining through a double slit. The distance from the first node(dark) to the third node is 4cm. Determine the slit seperation if the stance to the screen is 1.2m. So in the example, he solved that sicne D1 to D3 is 4cm, the distance between dark bands is 2cm. However, he used the constructive formula and plaggued in 2cm for the distance from Bo to B1. The constructive formual is d(Xm/L)=m*lamb…

Hi, My textbook asks the question: The phase of an Electromagnetic wave at a point P at some instant is 5pi. Which of the following statements about the field vector is true? A)Both the electric and the magnetic field vectors are 0 B)The electric field is 0 and the magnetic field has its maximum magnitude C)The electric field has its maximum magnitude and the magnetic field is 0 D)Both the electric and magnetic field vectors have their max magnitudes. My question for this question is, is the textbook talking about phase difference? If so, how can the magnetic field and the electric field have a phase difference since it is originating from the same source? Than…

Im on question 11 of the Web Assign. I thought the right way to do it would be to take the added mass of the person, multiply it by gravity to get the force, and then use F=-kx to get the spring constant. Then use that with T=2pi sqrt(k/x) to get period and then 1/T = F to get frequency. Am I on the right track but just getting wrong numbers?