Which option is correct?

Which option is correct?#

Part 1#

It is possible for the acceleration and velocity vectors of an object to be always perpendicular to each other.

Answer Section#

  • True

  • False

Part 2#

An object can be accelerated without changing its kinetic energy.

Answer Section#

  • True

  • False

Part 3#

When measured from the zero-momentum reference frame, the system’s kinetic energy is also always zero.

Answer Section#

  • True

  • False

Part 4#

When a car accelerates gradually (no squealing tires), is the friction between the tires and the road kinetic or static?

Answer Section#

  • Kinetic

  • Static

Attribution#

Problem is licensed under the CC-BY-NC-SA 4.0 license.
The Creative Commons 4.0 license requiring attribution-BY, non-commercial-NC, and share-alike-SA license.