Lift and Weight

An elevator is acceleration upward from rest...

• you feel lighter 
• you don’t feel your weight
• you feel heavier 
•  you feel your true weight

Tags

NGSS.HS-PS2-1

An elevator accelerates upward,  the net force equation is 

• Fn - Fg = ma
• Fn + Fg = ma
• Fn x Fg = ma
• Fn - Ff = ma

Tags

NGSS.HS-PS2-1

The man picture at rest or true weight is 700 N, the scale reads 400 N.  The elevators is... 

• moving upward AND acceleration upward
• at rest 
• moving upward BUT slowing down
• moving at a constant velocity of 7 m/s

Tags

NGSS.HS-PS2-1

The man pictured has a true or at rest weight of 700N but the scale reading is 1000 N.  The elevator must be ...

• moving upward AND acceleration upward
• moving upward BUT slowing down
• moving downward AND accelerating downward
• moving upward at a constant speed  of 8 m/s

Tags

NGSS.HS-PS2-1

The combination of all forces that act on an object is called the net force.

• T
• F

Tags

NGSS.HS-PS2-1

An elevator accelerates UPWARD at 2.0 m/s², as illustrated in the diagram below:
The passenger has a mass of 85 kg.  Calculate the force the floor exerts on the passenger. 

• 1020 N
• 0 N
• 833 N
• 680 N

Tags

NGSS.HS-PS2-1

An elevator accelerates at DOWNWARD at 2.0 m/s².  The passenger has a mass of 85 kg.  Calculate the force the floor exerts on the passenger.

• 1020 N
• 0 N
• 833 N
• 680 N

Tags

NGSS.HS-PS2-1

An elevator is moving up at a constant velocity of 2.5 m/s. The passenger has a mass of 85 kg.  Calculate the force the floor exerts on the passenger.

• 1045.5 N
• 0 N
• 850 N
• 620.5 N

Tags

NGSS.HS-PS2-1

What is simple machine is this?

• lever
• wedge
• screw
• pulley

What is the unit of measurement for force?

• AMP
• Seconds
• Newtons
• Miles

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4