Energy 9, 10, and 11 Practice Test

Energy is a property that enables something to...

• be kinetic energy

• be radiant energy

• allow force

• do work

Tags

NGSS.MS-PS3-4

What is work?

• potential energy

• when a force is used to move an object

• effort force

• convection

• conduction

In order for work to be done which of the following two conditions must ALWAYS be met? (Check all that apply).

• work must be applied to an object over a distance

• the object is lifted to gain gravitational energy

• the object must move in response to the force

Which of the following are examples of work being done?

• a toy car at rest

• when your pencil moves across a paper writing

• a fan is connected to an electrical circuit, and the blades move

• a toy car at rest is pushed to move

• a fan not moving

What is the MAIN purpose of a simple machine?

• change directions of the effort force

• reduce the amount of effort force needed to do work

• measure the mechanical efficiency

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A Simple Machine is a device that reduces the amount of effort force needed to do work by...

• decreasing the distance that the force is applied to

• increasing the distance that the force is applied to.

• neither increasing or decreasing the distance the force is applied to

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What are the four types of simple machines?

• incline plane, lever, wheel & axle, and ramp

• lever, wheel & axle, screw, and pulley

• lever, incline plane, pulley, wheel & axle

• incline plane, wedge, pulley, wheel & axle

What is a lever?

• a grooved wheel with a rope running along the groove

• a round object with a hole or a rod to fit through that rotates

• a sloping surface

• a rigid bar/board that is free to move around a fixed point (fulcrum)

What is a pulley?

• a grooved wheel with a rope running along the groove

• a sloping surface

• a round object with a hole or a rod to fit through that rotates

• a rigid bar/board that is free to move around a fixed point (fulcrum)

What is an inclined plane?

• a grooved wheel with a rope running along the groove

• a sloping surface

• a round object with a hole or a rod to fit through that rotates

• a rigid bar/board that is free to move around a fixed point (fulcrum)