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Q 1/7
Score 0
The two teams are pulling the rope in opposite directions, but the flag in the center is not moving. Why does the flag stay in the same spot?
60
There is too much friction
The teams are pulling with the same force
The team on right is pulling harder
The force of gravity is not strong enough
Q 2/7
Score 0
Stephanie started pushing a bookcase across the room, as shown in picture 1. Then, she removed the books and continued pushing with the same force and direction, as shown in picture 2. How does removing the books affect the motion of the bookcase?
60
The mechanical energy is decreased, making the bookcase move faster.
The gravity is increased, making the bookcase move slower.
The friction is increased, making the bookcase move slower.
The mass is decreased, making the bookcase move faster.
7 questions
Q.
The two teams are pulling the rope in opposite directions, but the flag in the center is not moving. Why does the flag stay in the same spot?
1
60 sec
Q.
Stephanie started pushing a bookcase across the room, as shown in picture 1. Then, she removed the books and continued pushing with the same force and direction, as shown in picture 2. How does removing the books affect the motion of the bookcase?
2
60 sec
Q.
Bar magnets have a north pole (N) and a south pole (S). Latrisha places a bar magnet on three small straws so it can roll. Her setup is shown below. Placing which of the following objects at point X will cause the bar magnet to move away from point X ?
3
60 sec
Q.
Ariana uses balloons to investigate static electricity. Which of the following best explains what will happen when she brings two positively charged balloons close to each other?
4
60 sec
Q.
Quentin makes a circuit tester using a battery, a light bulb, and wire. Then he tests objects to see which ones close the circuit between the metal screw hooks and light the light bulb. Which of the following objects closes the circuit?
5
60 sec
Q.
Electric circuits must be properly connected or electricity will not flow. Which of the following shows a properly connected circuit that would allow electricity to flow and light the bulb?
6
60 sec
Q.
Dwight’s parents use solar cells to provide extra energy for heating and cooling in their home. When solar cells are used, how is energy transformed?
