Physics 2020 Module 14 Review

2) In science, a theory is ------- A) a synthesis of a large body of well-tested knowledge. B) less than a fact. C) unchangeable. D) an educated guess.

A) a synthesis of a large body of well-tested knowledge.

1) Scientific hypothesis may turn out to be right or it may turn out to be wrong. If it is a valid hypothesis, there must be a test for proving it---- A) wrong. B) right.

A) wrong.

4). If no external forces are acting on a moving object, it will A) continue moving at the same speed. B) continue moving at the same velocity. C) move slower and slower until it finally stops.

B) continue moving at the same velocity.

3) A man weighing 1000 N stands at rest on two bathroom scales so that his weight is distributed evenly over both scales. The reading on each scale is A) 200 N. B) 1000 N. C) 500 N. D) none of these

C) 500 N.

5) A ball is thrown upwards and returns to the same position. Compared with its original speed after release, its speed when it returns is about -------- A) twice as much. B) half as much. C) the same. D) four times as much.

C) the same.