Answer:
clockwise from the south.
Explanation:
Given:
- velocity of the plane southwards,
- velocity of the wind in south-west,
- ∴Angle between the plane and wind velocities,
<u>According to the vector addition rule, magnitude of the resultant velocity is given as:</u>
is the plane's speed with respect to ground.
Direction of this resultant with respect to south:
clockwise from the south.
Answer:
Explanation:
Spilling the force of 60N on the rope at an angle θ in x-y direction:
fx = Fcosθ = 60cosθ
fy = Fsinθ = 60sinθ
cosθ and sinθ both vary from 0 to 1 between 0° to 90° but they go in opposite direction:
cos0° = 1 and cos90° = 0
sin0° = 0 and sin90° = 1
sin45° = cos45° = 0.7071
When θ increases from 0° to 90°,
θ=0°, fx = 60cos0° = 60N, fy = 60sin0° = 0N
θ=90°, fx = 60cos90° = 0N, fy = 60sin90° = 60N
θ=45°, fx = 60cos45° = fy = 60sin45° = 42.43N
If you write down the formula for friction, you will get an answer.
Ff = u * N Where N is a push down force that an object experiences.
u (mu) is a constant and has no units
It may not be accelerating and still experience friction. A is not correct.
Color and Density will not affect the frictional force. B is not so.
Buoyant forces are a different thing altogether. Generally friction has nothing to do with them. C is incorrect.
The last one is your answer. Technically mg should be the answer and not mass, but the second part is correct.