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.
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Data:
KE (Kinetic Energy) = ? (Joule)
m (mass) = 1500 Kg
v (speed) = 42 Km/h
converting to m/s (42 / 3.6), we have: v (speed) = 11.6 m/s
Formula:
Solving:
KE (Kinetic Energy) = ? (Joule)
m (mass) = 1500 Kg
v (speed) = 42 Km/h
converting to m/s (42 / 3.6), we have: v (speed) = 11.6 m/s
Formula:
Solving:
Answer
2) 1.5×10-2 m
Explanation
The potential difference is related to the electric field by:
(1)
where
is the potential difference
E is the electric field
d is the distance
We want to know the distance the detectors have to be placed in order to achieve an electric field of
when connected to a battery with potential difference
Solving the equation (1) for d, we find
Answer:
Explanation:
Given
mass of steel ball
initial speed of ball
Final speed of ball (in upward direction)
Impulse imparted is given by change in the momentum of object
therefore impulse J is given by
so magnitude of Impulse =4 N-s