Homework Statement
I have attached the question.
Homework Equations
W=Fd
The Attempt at a Solution
I get the answer as 240, but the correct answer is 120. What I did was get the component of the weight using mgsinθ = 6, then 6x40.
The answer says you need to do 360-240=120...
Homework Statement
This question isn't in a book, but I want to know the answer for myself.
Q. If I take an MCQ test with 40 questions, each question has 4 possible answers with only one being correct, what is the probability of getting 40/40 in the test by guessing?
I've tried solving...
The question is attached.
The correct answer is D
I got it as C first using the equation s=ut+1/2 a t^2
I took s as h, and t= (t2-t1)
I put u=0, which I discovered isn't correct. I then tried putting u=at1 and got a complex equation and got stuck there.
Homework Statement
A horizontal force of 2 N is just sufficient to prevent a block of mass 1 kg from sliding down a rough plane inclined at arcsin \frac{7}{25} to the horizontal. Find the coefficient of friction between the block and the plane and the acceleration with which the block will move...