# Physics

posted by .

1)An elevator is moving down with an acceleration of 1.40 m/s^2. A 14.5 kg block hangs from a spring balance fixed to the roof of the elevator. What is the apparent weight of the block?

m*g+m*a
14.5*9.80+14.5*1.40
142.1+20.3
162.4 N

2)A 2.7 kg box is released on a horizontal surface with an initial speed of 2.9 m/s. It moves on the surface with a deceleration of 0.27 m/s^2. Calculate the kinetic friction force on the box.

F=m*a
2.7*0.27
0.729 N

• Physics -

i am unsure of #1, but #2 is correct, i beleive. i am also a student and though i am not positive, i have worked the problem several times and am fairly certain this is the correct answer.

## Similar Questions

1. ### Algebra-based Physics

A large fish hangs from a spring balance supported from the roof of an elevator. If the elevator has an upward acceleration of 2.65 m/s^2 and the balance reads 70.0 N, what is the true weight of the fish?
2. ### physics

Apparent Weight. A physics student weighing 600 N stands on a bathroom scale in an elevator. As the elevator starts moving, the scale reads 420 N . A )Find the magnitude of the acceleration of the elevator. B ) Find the direction of …
3. ### physics

an 800 N person stands on a scale in an elevator. What is his apparent weight when the elevator is accelerating upward at 2 m/s^2?
4. ### physics repost

)An elevator is moving down with an acceleration of 1.40 m/s^2. A 14.5 kg block hangs from a spring balance fixed to the roof of the elevator. What is the apparent weight of the block?
5. ### 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 …
6. ### Physics

An elevator is moving down with an acceleration of 2.46 m/s^2. What would be the apparent weight of a 66 kg man in the elevator?
7. ### 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 …
8. ### physics

A large fish hangs from a spring balance supported from the roof of an elevator. If the elevator has an upward acceleration of 2.85m/s^2 and the balance reads 60.0N , what is the true weight of the fish?
9. ### Physics

An elevator is moving down with an acceleration of 1.40m/s^2.A 14.5-kg block hangs from a spring balance fixed to the roof of the elevator.What is the apparent weight of the block?
10. ### phy

A body hangs from a spring balance supported from the roof of an elevator. If the elevator has an upward acceleration of 3ms−2 and the balance reads 50 N, what is the true weight of the body?

More Similar Questions