Explain why the turning effect of a motor becomes zero at the angle 90 degree and what keeps up the motion​

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

An electromagnet is a device in which moving electric chargers in a coil of wire create a magnet.whats one advantage of using electromagnetic in devices

Coal contains energy. a. light b. kinetic c. chemical d. mechanical