Answer:
T = (3μmg - Fcosθ)/2
Explanation:
Since the boxes move to the right, the net force on box of mass 2m is
Fcosθ - 2μmg + T = ma (1)where Fcosθ = horizontal component of applied force, 2μmg = frictional force and T = tension in string and a = acceleration of box
The net force on the box with mass m is
μmg - T = ma (2) where μmg = frictional force, T = tension and a = acceleration of boxes.
Equating (1) and (2) we have
Fcosθ - 2μmg + T = μmg - T
collecting like terms
Fcosθ - 2μmg - μmg = -T - T
Fcosθ - 3μmg = -2T
(3μmg - Fcosθ)/2 = T
T = (3μmg - Fcosθ)/2
Answer:
The Wednesday test launch stored more potential energy, and launched the spacecraft at a faster speed because the stronger magnetic field closer to the magnet resulted in a greater increase in potential energy.
Explanation:
Answer:
crust
Explanation:
it's the outermost layer of the planet.
Its larger and if u where wondering to positive ions are smaller
Answer:
Explanation:
The tidal current flows to the east at 2.0 m/s and the speed of the kayaker is 3.0 m/s.
Let Vector 
is the tidal current velocity as shown in the diagram.
In order to travel straight across the harbor, the vector addition of both the velocities (i.e the resultant velocity, 
must be in the north direction.
Let 
is the speed of the kayaker having angle \theta measured north of east as shown in the figure.
For the resultant velocity in the north direction, the tail of the vector 
and head of the vector must lie on the north-south line.
Now, for this condition, from the triangle OAB
Hence, the kayaker must paddle in the direction of in the north of east direction.
