Question

A car heading north collides at an intersection with a truck heading east. if they lock together and travel 28 m.s at 46 degrees north of east just after the collision, how fast was the car initially traveling? assume that the two vehicles have the same mass.
A) 30 m/s
B) 80 m/s
C) 20 m/s
D) 40 m/s

Answer 1

Answer:

C) 20 m/s

Explanation:

The collision of the car and truck will give a single resultant velocity due to equal masses.

We'll treat this question as a vector question.

The velocity profile will form a right angle triangle.

To calculate the velocity of the car

Let the velocity be x

Sina = x/28

Sin46= x/28

0.7193*28 = x

20 = x

X = 20 m/s