Answer:
Density
Explanation:
Density is a property that will allow for a possible identification of a material. Different materials have different densities. The unit for density is g/cm^3
Answer:
The wooden floor exerts a greater force to give the same impulse as a padded mat.
Explanation:
-The wooden floor exerts a greater force for the same impulse as the padded mat.
-Unlike the wooded floor, the padded mat absorbs some of the energy when you fall. This in turn makes it exert less force on the body during the fall.
-Hence, you are less hurt when you fall on the padded floor.
From our physics class, we know that Work is a product of
Force and Displacement. The force must be the force in the same direction with
the displacement. So force and displacement must be parallel.
A. How much work in J does the string do on the boy if the
boy stands still?
Since we know that: Work = Force * Displacement
and in this case displacement is equal to zero, therefore
Work must also be equal to zero.
Work = 0
B. How much work does the string do on the boy if the boy
walks a horizontal distance of 11m away from the kite?
Now are given a displacement of 11 m which is a horizontal
distance. Therefore we must first calculate the horizontal component of force:
Fx = 4.5 N * cos 30
Fx = 3.897 N
So work is:
Work = 3.897 N * 11 m
<span>Work = 42.87 J ~ 43 J</span>
Answer:
t= 5 s the particle will be on the highest position.
The maximum values of particle will at t= 10 s
The minimum values of particle will at t= 5 s
Explanation:
Given that
Time when the particle will be on the highest position:
When the Z component of r(t) will be maximum then the particle will be on the highest position.
It means at t= 5 s the particle will be on the highest position.
Position at t= 5
Speed :
The maximum values of particle will at t= 10 s
The minimum values of particle will at t= 5 s
A ton of bricks weighs more than a ton of feathers.
hope this helps!
