Homework Statement
A study investigates the performance of students in an exam, which is known to follow a normal distribution, with a mean of 63 and a standard deviation of 21.
What is the probability that the difference between two randomly selected
students is more than 5 marks...
I'm unsure whether I have done the following problem correctly :)
Homework Statement
A ball is kicked at from the slope as shown.
When will the ball hit the slope?
http://img90.imageshack.us/img90/8084/slopevi0.th.jpg
Homework Equations
The distance traveled can be expressed...
I'm trying to do the following problem:
A car can accelerate and brake with constant acceleration, both with the magnitude (a). The car has a maximum velocity (v). The car needs to cover the distance (L), starting and ending at rest.
a) How long will it take the car to cover the distance...