Answer:
Direction
Explanation:
Speed is a scalar quantity, that is, it has only magnitude
While velocity is a vector quantity, which has both direction and magnitude.
Velocity is also called speed with direction.
Hence, we need to know the direction in which the car is moving in order to know the velocity.
Answer:
Have a blessed day!
Explanation:
The energy to launch the spacecraft came from moving the spacecraft against the magnetic force. The energy used to move a magnet against a magnetic force is stored as potential energy in the magnetic field. This magnetic force can convert potential energy stored in the magnetic field to kinetic energy.
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Answer:
F = 2.26 × 10⁻³ N
Explanation:
given,
length of rod = 11 cm
charge = 19 nC
linear charge density = 3.9 x 10⁻⁷ C/m
electric force at 2 cm away.
F = E q
integrating from 0.02 to 0.02 + L
F = 2.26 × 10⁻³ N
8.34 m/s
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The reference point is wherever you want it to be. If you define it
as the tip of the nose of one of the people, that's fine. Alternately,
it could be one of the claws on the dog across the street, or a leaf
on the tree that's directly over the people.
Since you're planning on describing the motion of the car, you
probably don't want to pick the car itself as the reference point.
If you did that, then the car would never move, but everything else
would.