ANSWER:
a. Velocity decreased
STEP-BY-STEP EXPLANATION:
If the person inside the bus experiences a forward movement, this means that the bus is braking, since by action-reaction to compensate for the movement, the body moves forward.
When braking, it means that there is a decrease in speed, therefore, the correct answer is a. Velocity decreased
Answer:
(a) 7 m/s
(b) 931 rad/s
(c) 0.716 s
Explanation:
Gravity would be exerting on the 2 masses
Since heavier, mass 1 (M) would be the one pulling down, while mass 2 is being pulled up.
So the net force on mass 1 is
This force would generate torque on the solid pulley
We can also calculate the pulley moments of inertia, with it being solid
From there we can calculate the angular acceleration of the pulley, which generates the entire system motion
Since the system is moved by a distance of d = 2.5m, the pulley would have turn an angle of
(c)The time it takes to get to this distance is
(b)The final angular speed of the disk is
(a) And so the perimeter speed of the pulley, which is also speed of mass 1 when it comes to d = 2.5 m is
A) 4.7 cm
The formula for the angular spread of the nth-maximum from the central bright fringe for a diffraction from two slits is
where
n is the order of the maximum
is the wavelength
is the distance between the slits
In this problem,
n = 5
So we find
And given the distance of the screen from the slits,
The distance of the 5th bright fringe from the central bright fringe will be given by
B) 8.1 cm
The formula to find the nth-minimum (dark fringe) in a diffraction pattern from double slit is a bit differente from the previous one:
To find the angle corresponding to the 8th dark fringe, we substitute n=8:
And the distance of the 8th dark fringe from the central bright fringe will be given by