Which option is correct?
Which option is correct?#
It is possible for the acceleration and velocity vectors of an object to be always perpendicular to each other.
An object can be accelerated without changing its kinetic energy.
When measured from the zero-momentum reference frame, the system’s kinetic energy is also always zero.
When a car accelerates gradually (no squealing tires), is the friction between the tires and the road kinetic or static?
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