A 1000 kg car traveling 20 m/s east experiences an impulse of 2000 Ns west. What is the final velocity of the car after the impulse has been applied?
Impulse is represented by Δp. It can be expanded such as: Δp = m(v-u) , where m is mass, v is final velocity, and u is initial velocity. (sorry ib physics things)
You can substitute your given values into the equation.
Δp = -2000 (i kept this as negative since it is going the opposite direction to your initial velocity)
m = 1000 kg
u = 20 m/s
1. -2000 = 1000(v-20) –> -2000/1000
2. -2 = v-20 –> -2 + 20
3. v = 18 m/s
You can always double check your answer by substituting it back into the original equation to make sure the Δp = -2000