Before the collision, the mass of the car is 1500kg, and the speed is 36km/hr, and the car is going to the north. What is its momentum? Is its momentum a vector? If it is a vector, indicate it's direction and magnitude. (We can define the north as the positive direction in the following calculation)

Momentum = 15000 kg·m/s

It is a vector.

Its direction is north and its magnitude is 15000 kg·m/s

Explanation:

Momentum is the product of mass and velocity.

We have to convert to SI units.

Momentum is a vector because it is the product of a scalar (mass) and a vector (velocity). It points in the direction of the velocity, in this case, north. Its magnitude is as found above.

it is called kinetic energy

this is poiselle's equation from fluid mechanic in physics. mech eng