You are a traffic accident investigator. you have arrived at the scene of an accident. two trucks of equal mass (3,000 kg each) were involved in a rear-end accident at a stop sign. here is what you know:

- truck 1 started from rest at the top of a 22-meter hill and coasted toward the intersection.
- truck 2 was on a flat stretch of road at the bottom of the hill directly in front of truck 1.
- at the bottom of the hill, truck 1 was going 20 m/s; truck 2 was going 35 m/s.
-there were no skid marks left by truck 2. the collision occurred at the stop sign where truck 2 had stopped.
- after the collision, both trucks moved together in the same direction at 10 m/s before slowly rolling to a stop.

1. what was the kinetic energy of each truck before they began braking?

2(a). how much energy did truck 1 lose from the top to the bottom of the hill?

(b) where do you suppose that energy went?

1) Kinetic energy of the truck 1 is 600,000 joules.

Kinetic energy of the truck 2 is 1,837,500 joules.

2 a)Potential energy of truck 1 is 646,800 Joules.

b) Energy lose by the truck 1 just got converted into heat and sound energy during the collision.

Step-by-step explanation:

Mass of the truck 1 and truck 2,m = 3000 kg

Velocity of the truck 1, = = 20 m./s

Velocity of the truck 2, = 35 m./s

1. Kinetic energy of the truck 1:

Kinetic energy of the truck 2:

2.a) Energy loose by the truck 1:

Initial height of the truck on the hill = 22 m

At that height potential energy will be maximum:

Potential energy of truck 1 at that height =

b) Energy lose by the truck 1 just got converted into heat and sound energy during the collision.

c. 65°

step-by-step explanation:

we are given a triangle with two known angles, 62° and 53°, while the third angle x is unknown and we are to find its value.

we know that the sum of angles in a triangle is equal to a total of 180 degrees. so we can write it as:

x + 62° + 53° = 180°

solving to find the value of x:

x = 180 - (62 + 53) = 65°

therefore, the value of x in this triangle is 65°.

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.