Work Physics

Work is done only when components of a force are parallel to a ​ ​ (a)   .

• displacement

• perpendicular

• parallel

• angled

The unit for force is ​ N

​ (a)  

• kg

• m/s

• J

• N

Tags

NGSS.HS-PS2-1

To calculate the net work done by a constant force we multiply "what" to the simple work equation?

• sin theta

• tan theta

• cos theta

• gravity constant

A spring is relaxed at 0.3 m and then stretched to 0.6 m. If it has a spring constant of 20 N/m, how potential energy is stored?

• 18 J

• .09 J

• 1.8 J

• 0.9 J

Tags

NGSS.MS-PS3-2

A spring is relaxed at 0.2 m and then stretched to 0.4 m. If it has a spring constant of 10 N/m, how potential energy is stored?

• .02 J

• .04 J

• .4 J

• .2 J

Tags

NGSS.MS-PS3-2

Mechanical potential energy is equal to kinetic energy plus ​ ​ (a)  

• total potential energy

• gravitational potential energy

• net force

• net work

Tags

NGSS.MS-PS3-5

If many constant forces are acting on an object, you can find the net work done on the object by first finding the ​ (a)   the object.

• net force on

• displacement of

• mass of

• acceleration of

Tags

NGSS.HS-PS2-1

If the force is applied on an object at an angle, only the ​ (a)   component causes displacement and contributes to the work.

• horizontal

• angled

• vertical

• displacement

A box was lifted a vertical distance of 2.0 m. If a constant net force of 150 N is exerted on the weights, what is the net work done on the box? (don't worry about sig figs)

• 30 J

• 300 N

• 300 J

• 30 N

Tags

NGSS.MS-PS2-2

A 3 kg sled is moving 2 m/s. What is the kinetic energy?

• 12 J

• 6 J

• 4 J

• 8 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5