Answer:
The focus of Lesson 1 is Newton's first law of motion - sometimes referred to as the law of inertia. An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Explanation:
We have,
Mass of a car is 1285.0 kg
Initial speed of a car is 25 m/s in an easterly direction
Mass of a truck is 600 kg
Initial speed of a truck is 20 m/s
After the collision, final velocity of the car is 18 m/s
(A) Let is the velocity of velocity of the truck right after the collision. Using conservation of linear momentum. So,
(B) Initial kinetic energy of truck car system :
(C) Final kinetic energy of truck car system :
So, the change in kinetic energy is :
(C) The change in mechanical energy occurs when the energy gets converted in the form of heat and sound energy.
Answer:
Design explained below
Explanation:
We are designing a link which is able to sustain 3500 N force because it will automatically sustain any lower force.
The tensile strength of AISI 1040 steel is : 585 MPa
Shear Strength = 338.15 MPa from data book
Now, 585 * 10^6 = 3500 / [Area]
(from pressure = force / area)
So, area = 5.98*10^-6= pi / 4 * d^2
So, diameter = 2.76 mm
Also, 338.15 *10^6 = 3500 / (pi * d * L)
So, L = 37.5 mm
The equation of D = m/V
Where D = density
m = mass
and V = volume
We are solving for V, so with the manipulation of variables we multiply V on both sides giving us
V(D) = m
now we divide D on both sides giving us
V = m/D
We know our mass which is 600g and our density is 3.00 g/cm^3
so
V = 600g/3.00g/cm^3 = 200cm^3 or 200mL
a cubic centimeter (cm^3) is one of the units for volume. It's exactly like mL. 1 cm^3 = 1 mL
If you wish to change it to L, you'd have to convert.