Static friction only arises in the response to an attempt to ________ .

• move an object along a surface

• stop an object along a surface

Why is an inclined plane a good solution for a lifting task ?

• The force required will be more than the force required to lift the object directly

• The force required will be less than the force required to lift the object directly

• The force required will be less than the force required to lift the object indirectly

Tags

NGSS.HS-PS2-1

What is the principle of the conservation of mechanical energy ?

• the total mechanical energy (PE + KE) of an object doesn't remain constant as long as no other force is applied

• the total mechanical energy (PE + KE) of an object remains constant as long as no other force is applied

• the total mechanical energy (PE + KE) of an object remains constant as long as other forces are applied

In a wheel and axis arrangement, force is usually applied to the (larger/smaller) wheel in order to move the (larger/smaller) wheel .

• smaller

  smaller

• smaller

  larger

• larger

  larger

• larger

  smaller

Tags

NGSS.MS-PS2-2

What are the two types of mechanical energy ?

• nuclear energy

• potential energy

• kinetic energy

• solar energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

What is the formula for calculating kinetic energy ?

What is the formula for calculating torque ?

What is the formula for calculating pressure applied evenly to a surface ?

What is the formula for calculating gravitational potential energy ?

What is the formula for calculating friction ?