Physics Quiz

Which diagrams show the conversion of chemical energy to mechanical energy?

• A. 1 and 2

• B. 1 and 3

• C. 2 and 4

• D. 3 and 4

Two boys are pushing on a wagon from opposite sides. What happens to the wagon if the boys push with equal force?

• A. The wagon does not move.

• B. The wagon moves in a circle.

• C. The wagon reverses its direction.

• D. The wagon moves in the direction of the bigger boy.

Tags

NGSS.MS-PS2-2

What is the main disadvantage of using coal to produce electricity?

• A. Coal is more expensive than other energy resources.

• B. Burning coal releases harmful substances into the air.

• C. Few sites have adequate coal supplies.

• D. Coal can only be produced in a laboratory setting.

Tags

NGSS.MS-ESS3-5

A box weighs 200 N. If you push on the box with a force of 15 N and the box does not move, how much work did you do?

• A. 0 J

• B. 15 J

• C. 15 N

• D. 3000 J

The tendency of an object at rest to stay at rest is called

• A. acceleration

• B. balanced forces

• C. inertia

• D. velocity

You feel warm when you sit under a heat lamp because energy moves to you mainly by

• A. radiation

• B. conduction

• C. convection

• D. currents

Two football players push against each other. They do not move, but then player B moves forward and player A moves backward. Why does this happen?

• When the players push on each other, they cause action-reaction forces that are unequal.

• Player A pushes with a greater force, causing a net force that acts in his direction.

• Because the players push in different directions, the net force is zero.

• At first the forces are balanced, but then player B exerts a greater force, causing unbalanced forces.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which forms of energy are produced by a lightbulb?

• chemical energy and thermal energy

• light energy and thermal energy

• electrical energy and thermal energy

• chemical energy and light energy

Which of the following is not a unit used to express velocity?

• km/h

• m/s

• m/h

• m/s/s

Which of the following is not a way to use less electricity?

• turning off lights when you leave a room

• keeping your computer on all the time

• using fluorescent bulbs

• running fans on low speed