Physics
posted by Lindsay .
A man stands on a scale in an elevator that is accelerating upward. The scale reads 731.6 N. When he picks up a 35.0 kg box, the scale reads 1108.2 N. The man weighs 68 kg. What is the acceleration of the elevator?
What do I need to do in order to solve this?

scalereading= mg + ma where m is the mass involved.

m is 68 kg?

m is 68 when scale reading is 731.6
731.6=68(9.8+a)
1108.2=103(9.8+a)
solve for a. You could have done it with either equation, whomever wrote the problem should not have given the mans mass, that way, you would have had two equations with two unknowns. 
I come up with 0.96 m/s^2. Is this correct?

N/m I finally got it. Thanks for all your help. :)
Respond to this Question
Similar Questions

Physics
A man measures the acceleration of an elevator using a spring balance. He fastens the scale to the roof, and suspends a mass from it. If the scale reads 98N when the elevator is at rest, and 93N when the elevator is moving. a) what … 
Physics
A man measures the acceleration of an elevator using a spring balance. He fastens the scale to the roof, and suspends a mass from it. If the scale reads 98N when the elevator is at rest, and 93N when the elevator is moving, (a) what … 
physics
An 800 N man stands on a scale in a motionless elevator. When the elevator begins to move, the scale reads 650 N. Find the magnitude and direction of the elevator's acceleration. 
Physics
You stand on a bathroom scale that rests on the floor of an elevator. Standing on the scale compresses internal springs and activates a dial that indicates your weight in newtons. When the elevator is at rest, the scale reads 600 N. … 
physics
Luke stands on a scale in an elevator which has a constant acceleration upward. The scale reads 0.964 kN. When Luke picks up a box of mass 18.2 kg, the scale reads 1.202 kN. (The acceleration remains the same.) Calculate the acceleration … 
Physics
Luke stands on a scale in an elevator which has a constant acceleration upward. The scale reads 0.964 kN. When Luke picks up a box of mass 18.2 kg, the scale reads 1.202 kN. (The acceleration remains the same.) Calculate the acceleration … 
physics
A 69kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 823 N. What is the acceleration of the elevator? 
Physics
Riding in an elevator, a man notices that he feel heavier or lighter based when the elevator speeds up or slows down. He stands on a bathroom scale in the elevator to take some measurements. Assume that his mass is 85 kg. a. What is … 
physics
A 61kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 815 N. What is the acceleration of the elevator? 
physics
A 61kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 815 N. What is the acceleration of the elevator?