Newton's Third Law states that "every action has an equal and opposite reaction". In a rocket, burning fuel creates a push on the front of the rocket pushing it forward. This creates an equal and opposite push on the exhaust gas backwards.
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.
B it will not be normal until they killed the bacteria
Answer:
To summarize, potential energy is the energy that is stored in an object due to its position relative to some zero position.
Explanation:
An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.
