Work, Power, Simple Machines, Mechanical Advantage

1. A book weighing 1.0 newton is lifted 2 meters.  How much work was done?

• 2 J
• 0.5 J
• 4 J

• 3 J

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A force of 15 newtons is used to push a box along the floor a distance of 3 meters.  How much work was done?

• 3 J
• 45 J
• 5J

• 150 J

Tags

NGSS.MS-PS3-5

It took 50 joules to push a chair 5 meters across the floor. With how much force was the chair pushed?

• 250N
• 10N
• 100 N

• 0.10 N

Tags

NGSS.MS-PS2-2

A force of 100 newtons was necessary to lift a rock.  A total of 150 joules of work was done.  How far was the rock lifted?

• 1.5m
• 15,000 m
• 0.67 N

• 250 J

Tags

NGSS.HS-PS3-1

It took 500 newtons of force to push a car 4 meters.  How much work was done?

• 2,000 J
• 125 J
• 0.008 J

• 1000 J

A young man exerted a force of 9,000 newtons on a stalled car but was unable to move it.  How much work was done?

• 9,000 J
• 0 J= No work
• 9 J

• 900 J

Which 3 parts make up "Work"?

• A force must be applied to the object

• The object must move

• The object must move in the same direction as the force

• The object must move in the opposite direction as the force

Tags

NGSS.MS-PS2-2

• Mass (m)

• Force (F)

• Joules (J)

• Work (W)

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Mathematically...we say: Work equals

• Force x Mass

• Force x Distance

• Mass x Acceleration

Tags

NGSS.MS-PS3-5

True or False?

A simple machine does not help you do less work.

• True

• False