Exploring Work, Power, and Machines

What is the formula for calculating work done when a force is applied to move an object?

• Work = Force × Distance

• Work = Mass × Acceleration

• Work = Force × Time

• Work = Mass × Velocity

Tags

NGSS.MS-PS3-5

Which of the following is an example of a simple machine?

• Lever

• Engine

• Battery

• Circuit

What is the Lewis dot structure for the element Oxygen (O)?

• :O:

• O::

• O:

• :O::

In the Bohr model of the atom, electrons orbit the nucleus in specific paths. What are these paths called?

• Orbits

• Shells

• Layers

• Levels

• Hydrogen oxide

• Dihydrogen monoxide

• Hydroxide

• Water

According to Newton's first law, an object at rest will stay at rest unless acted upon by a(n) _______.

• Balanced force

• Unbalanced force

• Gravitational force

• Magnetic force

Tags

NGSS.MS-PS2-2

Tags

NGSS.MS-PS1-5

Calculate the power if 50 Joules of work is done in 5 seconds.

• 5 Watts

• 10 Watts

• 15 Watts

• 20 Watts

Tags

NGSS.MS-PS3-5

Which of the following is a compound machine?

• Scissors

• Pulley

• Inclined plane

• Wedge

Draw the Bohr model for a Lithium atom. How many electrons are in the second shell?

• 0

• 1

• 2

• 3

Tags

NGSS.MS-PS1-1