Answer:
Change in momentum is
Solution:
The momentum of any body is the product of its mass and the velocity associated with the body and is generally given by:
Now, as per the question:
Mass of the car, M = 1500 kg
The velocity in the east direction,
The velocity in the north direction,
Now, the momentum of the car in the east direction:
Now, the momentum of the car in the north direction:
Change in momentum is given by:
Now,
(Since, )
Answer: A) because forces are what stop and start motion
Explanation:
From Newton's first law, an object tends to stay in state of rest or motion unless acted upon by an unbalanced external force. This is also known law of inertia. This is because a force can stop or start a motion. A force cause body to accelerate to decelerate otherwise the body continues with constant speed.
D, as he is testing which type of fertiliser is the best, and hence it should be the only changed variable. Everything else should remain the same.
Answer:
one half as large , initial velocity is two times larger
Explanation:
Momentum is conserved.
p₁ + p₂ = p₁' + p₂'
m₁v₁ + m₂v₂ = m₁v₁' + m₂v₂'
m₁ = m₂ =m , v₂= 0
v₁' =v₂'
mv₁ = 2mv₁'
v₁ = 2v₁'