PhysicsRankPREVIEWTry a problem

THE PRACTICE STUDIO

Go slowly. Ask why. Make it yours.

PRACTICE · MEMBERSIntermediate · Single correct

PRACTICE / Power

A fast cart needs less drive force

An ideal drive transfers 240 W to a cart moving at 8 m/s. Its driving force is parallel to motion.

Find the instantaneous driving force.

Organize the givens & assumptions
  • P = 240 W
  • v = 8 m/s

Instantaneous drive power delivered mechanically; force parallel to nonzero cart velocity.

  1. A240 N240\ \mathrm N
  2. B3.75 N3.75\ \mathrm N
  3. C30 N30\ \mathrm N
  4. D1920 N1920\ \mathrm N

Try it on paper first. Free sample problems in every collection include the complete reasoning: find one in this collection →