complete physics midterm question pool

7 m/s

0.40 m/s

4d

96 m

15.6 m/s

2v

Ball 2 takes less time. The maximum height it reaches is less than that of Ball 1.

15 m

19 m/s

5 m/s

26 m/s

increases, increases

(2i - 9j), 9.2

2D

A vector with a magnitude greater than s

North

g/4

decreasing acceleration, increasing resistive force

A block is at rest on a desk’s horizontal surface. A student correctly identifies the forces exerted on the block as the force of Earth on the block and the force of the desk on the block. A book then is placed between the block and the desk. Which objects exert forces of equal magnitude on the block after the book has been introduced?

Earth and the book

A student pushes a box across a rough horizontal surface. Which of the following includes all the forces exerted on the box that are a result of interatomic electric forces?

The force of friction, the normal force, and the force exerted by the student

The diagrams are accurate because the string is pulling up with the same force on both blocks and the gravitational force is greater for Block B.

Four upward forces are exerted on the system because there are four tensions which exert upward forces on the system.

Each of the above statements is possible depending on which object or system the free-body diagram represents.