Year 9 Moments and levers

What units is a moment measured in for SI units?

• Newton-meters

• Foot-Pounds of Force

• Foot Pounds

• Newton-kilometers

What condition must be met if an object is to be in equilibrium?

• force on it must be balanced

• force on it mus be unbalanced

• resultant force more than 10 N

• resultant turning effect more than 10

The moment of force is defined as the product of....

• the force and the acceleration

• the force and the perpendicular distance

• the force and the velocity

• the force and the perpendicular distance from pivot

What is the correct equation for calculating a force? 

• force = perpendicular distance x moment 
• force = moment / perpendicular distance
• force = perpendicular distance / moment

Tags

NGSS.HS-PS2-1

What is the net Moment?

• 0 Nm

• 4 Nm (clockwise)

• 30 Nm (clockwise)

• 30 Nm (anti-clockwise)

What is the anticlockwise moment acting on this crane?

• 80,000Nm
• 100,000Nm
• 120,000Nm
• 140,000Nm

What does the Pivot describe?

• The point of rotation

• The point to measure distance from

• The screw head

• The pin location

What is the moment acting on the seesaw?

• 1.6Nm
• 15Nm
• 16N
• 4Nm

Tags

NGSS.HS-PS2-1

What is the moment produced by the 15 N?

• 15 Nm (clockwise)

• 150 Nm (anti - clockwise)

• 1.5 Nm (anti - clockwise)

• 0.15 Nm (clockwise)

A lever is designed to:

• reduce the amount of force required to do work
• increase the amount of effort required
• increase the amount of energy needed to work

Tags

NGSS.MS-PS2-2