Answer:
(a) ωM=ωA
(b) vA = (0.625)vM
Explanation:
The tangential velocity of the body is calculated by the following formula:
v = ω*R Formula (1)
where:
v is the tangential speed of the body in feet over second (ft/s)
ω is the angular speed in radians over second (rad/s)
R is the radius of the the body in the circular path in meters (m)
(a) What is Mary's angular speed ωM compared to that of Alex's angular speed ωA
The angular speed of Mary and Alex is determined by the angular speed of the carousel ( ωC),therefore it is the same for both:
ωM=ωC , ωA=ωC
ωM=ωA
(b) What is Mary's tangential speed vM compared to that of Alex's tangential speed vA?
Data:
RM = 8 ft : Mary radio
RA = 5 ft : Alex radio
We apply the formula (1)
v = ω*R
vM = ωC *8 : Mary's tangential speed
vA = ωC *5 : Alex's tangential speed
We establish the relationship between vA and vM like this:
vA/vM = (ωC*5) / (ωC*8)
We cancel ωC
vA = (5/8)vM
vA = (0.625)vM
Both, there are two different types of molecules to distinguish that
Answer:
0Nm, no work is done.
Explanation:
Work done is defined as the Force per distance meaning force times the distance moved in the direction of the force.
Now the body of mass 50g has a centripetal force acting on it directed towards the centre. Now in actuality the body stays along the circle it doesn't really move to the centre of the circle.
Hence the force doesn't move a distance, and so from the definition of work done;
F×d ; d =0
Hence work done = mv2/r × 0= 0Nm
Because we can predict the outcome by making a hypothesis from what you already know.
you pick a certain route bc you know the other has more traffic and will take longer even though it is a shorter distance