Forces at Angles
Elevators
Atwoods
Luck of the Draw
If You Dare
100
Before solving for FN, you must solve for...
a) Ff
b) Fy
c) Fnet
Fy
100
Which force changes as an elevator accelerates upward or downward?
FN (Normal Force)
100
Which will have the least acceleration?
a) m1 = 2.2 kg m2 = 2.8 kg
b) m1 = 33 kg m2 = 35 kg
a
100
A 600 N person is rinding in an elevator. Between floors, the elevator is moving at a constant velocity of 5 m/s. What is the apparent weight of the person?
600 N
100
What is the mass of a 35 N rock?
3.5 kg
200
In this situation, the normal force will (increase, decrease or stay the same)
decrease
200
What happens to the apparent weight of a person who is accelerating downwards?
decreases
200
If m1 = 10 kg and m2 = 3 kg then Fnet = ?
70 N
200
A 100 N (10 kg) crate is accelerating downwards at a rate of 2 m/s. What is the tension on the crate?
80 N
200
Which diagram indicates a downward acceleration?
B
300
When this force is applied to the object, the normal force will (increase, decrease or stay the same)
Increase
300
What happens to the apparent weight of a person who is accelerating upwards?
increases
300
If m1 = 2 kg and m2 = 3 kg then a = ?
2 m/s2
300
A 100 N (10kg) crate is dangling at rest. What is the tension on the chain?
100N
300
What are two possible situations in which the apparent weight of a person in an elevator would be equal to their actual weight?
Elevator moving at a constant velocity, or elevator at rest.
400
If Fa = 80 N, Fg = 100 N, Ff = 40 N, Fx = 69.3 N, and Fy = 40, then FN = ________?
140 N
400
If Fg = weight then FN = ?
apparent weight
400
Give an example of a situation where an Atwood Machine would be at equilibrium.
any where m1 = m2
400
What force is a bathroom scale measuring?
Normal force.
400
What is incorrect about this Free Body Diagram?
The tension forces should be equal.
500
This object is accelerating. In terms of Fg , Ff , Fa , FN, Fx , and Fy. What will the net force be equal to?
Fnet = Fx - Ff
500
A 2000 N elevator is traveling downward while slowing down at a rate of 3 m/s2. What is the apparent weight of the rider?
2600 N
500
Of these two combinations, which one will have the greatest tension?
a) m1 = 3 kg m2 = 2 kg
b) m1 = 3 kg m2 = 3 kg
b
500
The cable supporting an elevator breaks. What is the apparent weight of the 50 kg girl who is riding in the elevator?
0 N
500
If Fa = 90 N (applied at an angle of 30 degrees), Fg = 100 N, Ff = 40 N, and FN = 145 N, then what additional force would need to be applied to the object in order for it to move with a constant velocity? Include both magnitude and direction.
37.94 N to the right (or east)