Mechanical

Which type of mechanical weathering is represented in the picture?

• abrasion

• exfoliation from uplifting

• thermal expansion

• plant action

• animal action

A roller coaster car moves on a roller coaster track through positions w, x, y, and z. At what position will the roller coaster car most likely have the greatest kinetic energy?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The diagram below shows a model airplane. Which energy transformation occurs in a rubber band powered model airplane when it is flown?

• Thermal energy stored in the rubber band is transformed into chemical energy used by the propeller.

• Kinetic energy stored in the rubber band is transformed into thermal energy used by the propeller.

• Chemical energy stored in the rubber band is transformed into potential energy used by the propeller.

• Potential energy stored in the rubber band is transformed into mechanical energy used by the propeller.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

An amusement park engineer noticed that the roller coaster cart did not make it to the end of the track. He checks and determined that it was not a friction issue with the cart and track. Explain what he needs to do to help the cart reach the end of the track.

• Decrease the distance between the first and second hill to build more potential energy.

• Add another hill towards the end of the roller coaster to increase the amount of kinetic energy.

• Increase the height of the first hill to increase the amount of initial potential energy.

• Remove a hill and decrease the added friction at the end of the track.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Frank throws the same ball three different times. The diagram below shows the top speed at which the ball traveled during each throw.

• The ball had the most kinetic energy during the first throw.

• The ball had the most kinetic energy during the third throw.

• The ball had the most kinetic energy during the second throw.

• The ball had the same kinetic energy during all three throws.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which situation is an example of increasing potential energy?

• Pulling a wagon uphill

• Emptying a bucket of water

• A cat jumping from a tree

• A bicyclist stopping at a stop sign

Tags

NGSS.MS-PS3-2

A metal ball has a constant velocity of zero. Which other quantity must also be zero?

• weight of the ball

• energy of the ball

• acceleration of the ball

• inertia of the ball

Waves that need to travel through matter are known as

• Medium waves

• Mechanical waves

• Air waves

• Heat waves

Tags

NGSS.MS-PS4-2

What property of the wave is represented by the letter "B"?

• amplitude

• crest

• trough

• wavelength

Tags

NGSS.MS-PS4-1

What is the primary function of a mechanical lever in a simple machine?

• To increase the speed of an object

• To change the direction of a force

• To decrease the weight of an object

• To convert electrical energy to mechanical energy

Tags

NGSS.MS-PS2-2