The models are used to represent what you are studying in this case would be a planet. A model of Saturn and its rings and the moons surrounding it would be fantastic to look at when you have no way of going there
A:a diver jumping Off a diving Board And falling to the swimming pool below
Answer:
11 m/s
Explanation:
Draw a free body diagram. There are two forces acting on the car:
Weigh force mg pulling down
Normal force N pushing perpendicular to the incline
Sum the forces in the +y direction:
∑F = ma
N cos θ − mg = 0
N = mg / cos θ
Sum the forces in the radial (+x) direction:
∑F = ma
N sin θ = m v² / r
Substitute and solve for v:
(mg / cos θ) sin θ = m v² / r
g tan θ = v² / r
v = √(gr tan θ)
Plug in values:
v = √(9.8 m/s² × 48 m × tan 15°)
v = 11.2 m/s
Rounded to 2 significant figures, the maximum speed is 11 m/s.
A) A fault occurs when stresses in the crust cause land on one side of the fracture to move to relation to the other side.
Force = (mass) x (acceleration)
= (275kg) x (-4.5 m/s²) = -1,237.5 newtons.
In order for this mass to experience acceleration of -4.5 m/s²,
it must be pushed by -1,237.5 newtons of force, otherwise
it will not have that acceleration.
The plus and minus signs are completely your choice. The
positive direction is the direction you decided to call positive
when you started working with the problem. Chances are,
you probably called the positive direction the one in which
the object is already moving. That makes the acceleration
positive if the object is speeding up, negative if it's slowing
down.
If the acceleration is positive (speeding up), that means the
object is being pushed by a force in the same direction it's
already moving. If the acceleration is negative (slowing down),
that means the object is being pushed by a force opposite to
the direction it's already moving ... the negative direction.