Answer: same
Explanation: They both weigh a kilogram and there is no friction
Answer:
623.5lb
Explanation:
The answer is detailed in the attached photo
Your position in meters will, measured relative to the starting point of the car behind you, be
x1(t) = 10 + 23.61 t - 1/2 4.2 t^2
his position will be
x2(t) = 16.67 t
Hence at any time the separation s(t) will be
s(t) = x1(t) - x2(t) = 10 + 6.94 t -2.1 t^2
Now I assume you mean that you will decelerate UNTIl you are driving at the legal speed limit (60 km/h). That will take you:
16.67 m/s = 23.61m/s - 4.2 m/s^2 * t
t = 1.65 seconds
What is the separation at that time? If it is still greater than zero, there will be no collision:
s(1.65) = 10 + 6.94 *1.65 -2.1 (1.65)^2 = 15.73 meters.
Hence you will NOT collide. The 1.65 s you calculated was the time needed to brake to the speed of 60 km/h.
Answer:
80 cm
Explanation:
To find the minimum distance from the slits to the screen you use the following formula for the m-th fringe of the interference pattern:
m: order of the fringe
λ: wavelength = 632.8*10^-9 m
D: distance to the screen
d: distance between slits = 0.034*10^-3
for the distance between fringes you have:
( 1 )
By replacing the values of the parameters in (1) you can find the distance D to the screen:
hence, the distance from the slits to the screen is 80 cm
