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true or false questions: 1. If a normal force is acting on a body, the normal...

true or false questions:

1. If a normal force is acting on a body, the normal force will never be in the direction that the body is moving.

2. A body can experience a weight force and have no mass.

3. During a one-hour trip, a small boat travels 80.0 km north and then travels 60.0 km east. The average velocity of the boat was 100 km/h.

4. A body undergoing projectile motion will always have a constant acceleration.

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