WorksheetsApparent Weight ( Grav, Normal Force)
Total questions: 25
Worksheet time: 24mins
How do you calculate force of gravity?
Fg = m/g
Fg= m+g
Fg= m
Fg= m*g
What is a normal force?
It always opposes gravity. The same as a frictional force.
It is equivalent to the weight of an object.
It acts as a supporting force from the surface below.
It is equivalent to mass.
What is the net force?
5000 N right
4000 N right
40 N left
4000 N left
Match description with free-body diagram.
A person in an elevator that is at rest.
A person in an elevator that is accelerating upwards.
A person in an elevator that is accelerating downwards.
A man standing on a scale in an elevator notices that the scale reads 40 newtons greater than his normal weight.
Which type of movement of the elevator could cause this greater-than-normal reading?
accelerating upward
accelerating downward
moving upward at a constant speed
moving downward at a constant speed
A woman standing on a scale in an elevator notices that the scale reads 100 newtons less than her normal weight. Which type of movement of the elevator could cause this greater-than-normal reading?
accelerating upward
accelerating downward
moving upward at a constant speed
moving downward at a constant speed
Your mass is 72 [kg]. What is your apparent weight (normal force) if you are in an elevator that is accelerating upwards at a rate of 9.8 [m/s/s]?
1411 [N]
0 [N]
706 [N]
353 [N]
The elevator is accelerating downwards at a rate of 2 m/s/s. What would the people in the elevator feel like?
Heavier than normal
Lighter than normal
Normal weight
Weightless
The elevator is accelerating upwards at a rate of 2 m/s2. What would the people in the elevator feel like?
Heavier than normal
Lighter than normal
Normal weight
Weightless
The elevator is moving upwards at a constant speed. What would the people in the elevator feel like?
Heavier than normal
Lighter than normal
Normal weight
Weightless
This free-body diagram is drawn to represent forces acting on a person in an airplane.
What sensation of weight will passengers aboard the airplane feel?
extra heavy
normal
extra light
not enough info given to conclude.
Which of these four motion maps shows an elevator that is not accelerating?
Which 2 of these 4 motion maps shows an elevator that is speeding up?
Which of these 4 motion maps shows an elevator that is slowing down?
The graph depicts what type of motion?
Rest
Constant Velocity
Speeding up
Slowing down
Which direction is the object moving based on the graph
positive
negative
Which direction is the object moving based on the graph
positive
negative
If the cable of the elevator breaks
acceleration is in the negative direction (downward)
acceleration is in the positive direction (upwardward)
there is no acceleration
Gravity from Earth...
stops at it's surface
stops after about 10,000 km near orbit of satellites
stops near the orbit of the Moon
goes on forever
