A -kg car starts from rest at the top of a -m-long driveway that is inclined at with the horizontal. If an average friction force of N impedes the motion, find the speed of the car at the bottom of the driveway.

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

You can watch static electricity in action by rubbing an inflated balloon against your hair. your hair will actually stand on its end! it does this because each hair becomes charged, and they all repel one another.