Car a has a mass of 5 kg and 10 m/s .cart B has a mass of 10 kg and 5 m/s .which of the following statements best compares the i
1 answer:
The two cars have same momentum
Explanation:
The momentum of an object is given by the equation
where
m is the mass of the object
v is its velocity
For the car A in this problem,
m = 5 kg
v = 10 m/s
So its momentum is
For car B we have,
m = 10 kg
v = 5 m/s
So its momentum is
Therefore, the two cars have same momentum.
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The momentum increases by a factor of 2
Explanation:
We can solve this problem by rewriting the momentum of the rocket in terms of the kinetic energy and the mass.
The kinetic energy of the rocket is:
(1)
where
m is the mass
v is the velocity
The momentum of the rocket is
(2)
From eq.(1) we get
and substituting into (2),
Now in this problem we have:
- The kinetic energy of the rocket is increased by a factor 8:
- The mass is reduced by half:
Substituting, we find the new momentum:
So, the momentum increases by a factor of 2.
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Answer:
- F = G Newtons
Explanation:
Given:
- Mass of 1st body =
- Mass of 2nd body =
To Find:
- Magnitude of gravitational force
Solution:
Here, we have a formula
<u>Substituting the values</u>
Know More:
The applied formula for the above solution is
where,
- F
= Gravitational force
- G = Gravitational constant
- M
= mass of 1st body
- M
= mass of 2nd body
- r = distance between two bodies