1. It will stay at rest due to inertia.
- acceleration
- The couch will move to the left with a force of 1 N.
- 6 N
- Friction pulls the skates' wheels westward.
- velocity
- its speed increases due to gravity
- It will have a constant velocity until acted upon by outside forces.
- 35 N
- mass
- sliding friction
- The couch will move with a force of 6 N.
- It is pushing up on the book.
- gravity
- There is less friction between the car tires and the ice than between the car tires and the road.
- balanced.
- Due to centripetal force, the water is pushing on the bottom of the bucket.
- a high velocity and a large mass
- Scientists in other countries use SI units when measuring speed
