A 20 kg cart moving at 4 m/s has how much momentum?
1 answer:
Answer:
We conclude that the required momentum is 80 kgm/s.
Explanation:
Given
- Mass m = 20 kg
- Velocity v = 4 m/s
To determine
The momentum p = ?
Important Tip:
- The momentum of an object is the product of mass and velocity.
We can determine the momentum using the formula
where
- p is the momentum
- m is the mass
- v is the velocity
now substituting m = 20 and v = 4 using the equation
kg m/s
Therefore, we conclude that the required momentum is 80 kgm/s.
You might be interested in
The angle of the force is
Explanation:
To solve this problem, we can apply Newton's second law along the horizontal direction of motion of the suitcase:
where
is the net force along the x-axis
m is the mass of the suitcase
is the acceleration along the x-axis
The suitcase is moving at constant speed, so the acceleration is zero:
Therefore the net force must also be zero:
(1)
We have two forces acting along the horizontal direction:
- The component of the push (forward) in the horizontal direction, , with
F = 43 N
= angle of the force with the horizontal
- The force of friction, , backward
So the net force can be written as
(2)
Combining (1) and (2),
And so we can find the angle:
Learn more about Newton's second law:
#LearnwithBrainly