Answer:
We have the output force (3000) and the mechanical advantage is 15, the formula is Ma = F(o) / F(i), so 15 = 3000 / x, so x = 200 newtons!
Answer:
The boat speed relative to the riverbank is 2.96 m/s
Explanation:
The boat move to the north at 2.7 m/s across the river and the river current is 1.2 m/s to the west, therefore the direction of the boat is perpendicular to the river (90).
The boat speed vb = 2.7 m/s
The current speed vc = 1.2 m/s
The formula to calculate the speed of the boad relative to the riverbanks (Vbc), as follow
vbc =
=
since cos 90 = 0, hence
vbc =
= 2.96 m/s
Answer:
C. must not be accelerating (i e, a = 0 m/s/s)
Explanation:
- When forces acting on an object are balanced the object is said to be at equilibrium.
- Unbalanced forces causes an object to accelerate, such that if two forces acting on an object are an equal, then the object will accelerate towards the direction of the greater force.
- On the other hand, when forces acting on an object are balanced, the object will be in a state of equilibrium and will not accelerate.
- Therefore, when forces are balanced acceleration is zero and the velocity of the object will remain constant.
<span>In this case, the angle of incidence equals the angle of reflection at the point that the light ray strikes the surface. Light is also reflected when it is incident on a surface or interface between two different materials such as the surface between air and water, or glass and water.</span>
Answer:
Explanation:
If the stone will reach the top position of flag pole at t = 0.5 s and t = 4.1 s
so here the total time of the motion above the top point of pole is given as
now we have
so this is the speed at the top of flag pole
now we have
now the height of flag pole is given as