MA, Work, Force and Weight

What is the weight of a 25 kg box on Earth? (Earth g= 9.8 m/s²)

• 25 kilograms

• 25 Newtons

• 245 Newtons

• 245 kilograms

Work is measured in what unit?

• Newtons

• Joules

• kilograms

• meters

Tags

NGSS.MS-PS3-5

A 45 kg table is taken to gravity free environment (g = 0 m/s²) in space. What factor(s) WILL NOT CHANGE?

• Its weight.

• Its mass.

• Both weight and mass.

• Neither weight or mass will change.

Bob uses 30 N of force to pull a wagon 12 meters. Kate uses 45 N of force to move a different wagon 8 meters. Who does more work?

• Bob

• Kate

• They both do the same amount of work.

• Impossible to tell from information given.

A 600 N force was used to push a car down the street. If 15,000 J of work was performed in moving the car, how far was it moved?

• 25 meters

• 45 meters

• 4 meters

• 15 meters

What is the Mechanical Advantage of an inclined plane that has a slope of 3.5 meters and a height of 1.25 meters?

• 0.36

• 4.75

• 2.80

• 4.38

Tags

NGSS.HS-PS2-1

What force is needed to cause an object to move 22 meters and produce 1430 J of work?

• 65 N

• 31,460 N

• 65 J

• 31,460 J

Tags

NGSS.HS-PS2-1

What is the mechanical advantage of the "block and tackle" pulley system shown here?

• 1

• 2

• 4

• 5

Tags

NGSS.MS-PS2-2

What is the mechanical advantage of the lever system shown here?

• 1

• 20

• 10

• 40

Tags

NGSS.MS-ETS1-1

If the effort force is 35 N and the resistance force is 105 N, what is the mechanical advantage of the ramp?

• .33

• 3

• 70

• 140

Tags

NGSS.MS-PS2-2