Mechanical Systems

What is the primary characteristic of torsion force?

• Twisting

• Compressing

• Pulling

The 6 simple machines are...

• Lever, nail, screw, pulley, wedge, wheel & axle

• Hammer, inclined plane, screw, pulley, nail, wheel & axle

• Lever, inclined plane, screw, pulley, wedge, wheel & axle

• Inclined plane, diamond, pulley, wedge, metal, wheel & axle

The mechanical advantage of a machine is the amount by which a machine can multiply a force.

• True

• False

The formula for finding the mechanical advantage is...

• Input / output

• output / input

• speed / height

• angle / speed

The gear is a ​ (a)   with elements of the lever in both the tooth-to-tooth interaction between the gear teeth & the transmission of power from one wheel to another as in a wheel & axle.

• compound machine

• simple machine

Gears are used to transfer ​ (a)   from one shaft to another to change the direction of rotation and ​ (b)   .

• power

• speed

• force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Gear wheel combinations of different diameters are used to ​ ​ (a)  

• increase or decrease speed.

• change the direction of a force.

Tags

NGSS.MS-ETS1-1

In an electric motor, electrical energy is transformed into what type of energy?

• Chemical

• Mechanical

• Thermal

• Nuclear

Tags

NGSS.HS-PS3-3

The belt looped around 2 pulleys in a ​ (a)   arrangement will cause both wheels to rotate in the same direction.

• parallel

• cross pattern

What type of energy conversion occurs in a hydroelectric power plant?

• Chemical to electrical

• Mechanical to electrical

• Solar to electrical

• Thermal to electrical

Tags

NGSS.HS-PS3-3