Two are true, one is not

Exercise and reference answers

Questions

1. False statement

   Force is needed to maintain uniform motion

   Statements

   1. Zero net force means zero acceleration
   2. Friction opposes motion
   3. Force is needed to maintain uniform motion

2. False statement

   Momentum is mass times acceleration

   Statements

   1. Momentum is mass times acceleration
   2. Momentum is mass times velocity
   3. The second law concerns rate of change of momentum

3. False statement

   Aristotle discovered the law of inertia

   Statements

   1. Galileo used inclined planes
   2. Aristotle discovered the law of inertia
   3. Newton restated the law of inertia

Explanation