A 1430 kg car speeds up from rest
to 14.0 m/s in 7.00 s. lgnoring
friction, how much power did that
require?
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Ответ:
Power is energy over time
P = E / t
So
P = (m v ^ 2)/ 2 t
P = 20 kW
Ответ:
Explanation:
Given:
Charge = q
Electric field strength =
weight of the droplet = mg
The charge is suspended motionless. This is because the electric force on the charge is balanced by the weight of the droplet.
electric force on charged droplet,
This is balanced by the weight,
Equating the two: