The combination of all of the forces acting on object is net force.
Answer:
increase.
Explanation:
as you being your trip dow hill you increase your speed resulting a transformation from GPE to KE.
To do this, all you need to do is get the momentum of each and get the sum. The formula of momentum is:
p=mv
where:
p = momentum
m = mass
v = velocity
Bicycle 1 and 2 have the same mass of 15 kg
Bicycle 1 v = 1 m/s
Bicycle 2 v = 3 m/s but because it was coming from the opposite direction then we get a negative velocity. The negative just indicates the direction so it will be -3m/s
m1v1+m2v2
=(15kg)(1m/s) + (15kg)(-3m/s)
= 15kg.m/s + (-45kg.m/s)
=-30kg.m/s
Their combined momentum before the crash is 30kg.m/s. We take out the negative sign because the question is asking only for the magnitude and not the direction and remember the negative sign indicates the direction.
