The tape in a videotape cassette has a total length 189 m and can play for 2 h. As the tape
starts to play, the full reel has an outer radius
of 47 mm and an inner radius of 14 mm. At
some point during the play, both reels will
have the same angular speed.
What is this common angular speed?
Answer in units of rad/s.

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer