To solve this problem we will apply the principle of conservation of energy and the definition of kinematic energy as half the product between mass and squared velocity. So,
Here,
m = Mass
V = Velocity
Replacing,
Therefore the final kinetic energy of the two car system is 72.6kJ
Answer:
Laws are created based on repeated experimentation.
Laws are based on observations.
Laws explain observations.
Explanation:
The complete question is..
Which statements correctly describe laws? Check all that apply.
-Laws are created based on repeated experimentation.
-Laws are based on observations.
-Laws explain observations.
-Laws are factual statements.
-Laws can be changed or replaced
Laws are based on the results of repeated experimentation, and observation, and they describe or predict some phenomenon in nature. Laws can't be said to be factual, as they might be seen to be constrained, or restricted and might need to be extended by future observations. Established laws explain observations, and laws cannot be changed or replaced, but can be extended, to predict future observations.
Answer:
Explanation:
It says “Momentum before the collision is equal to momentum after the collision.” Elastic Collision formula is applied to calculate the mass or velocity of the elastic bodies.
Answer:
acceleration = 1.79 m/s^2
Tension = 6817 N
Explanation:
First let's find Elizabeth's weight:
Her weight is greater than the normal force (N = 450 N), so the elevator is going downwards.
The acceleration of Elizabeth is given by:
Where P is the weight of Elisabeth, N is her normal force, m is her mass and a is the acceleration. Then, we have that:
The tension in the cable is given by:
In this case, we use the total mass, so we have: