Define centripetal acceleration in words and with a formula!
Back
Centripetal acceleration (ac) is the rate of change in the direction of velocity with time:
where v is velocity, r is the radius of thepath,
is angular velocity.
Front
Define acceleration in words and with a formula!
Back
Acceleration is the rate of velocity change with time:
where a is acceleration, dv is the change invelocity in time t.
Front
Define resistance and give its unit!
Back
According to Ohm’s law resistance (R) of a piece of conducting material is the ratio of the voltage applied across the piece of material (U) and the current through the material (I):
The unit of resistance is ohm: