Recent content by tjbateh

Homework Statement An elevator and its load have a combined mass of 2300 kg. Find the tension in the supporting cable when the elevator, originally moving downward at 12 m/s, is brought to rest with constant acceleration in a distance of 50 m. Homework Equations The Attempt at a...

Homework Statement A car traveling at 48 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 53 cm (with respect to the road) while being brought to rest by an inflated air bag. What magnitude of force (assumed constant) acts on the passenger's upper torso, which...

No, there is just the normal force. I got the normal force to be 1257.36 I believe.

Does 1257.36 seem right? I did (544.45i - 314.34j) + (-544.45i - 943.02j) + F(N) = 0 I get 0i + (-1257.36j) = 0 So F(N) is the Square Root of 1257.36^2, which is just 1257.36 I want to be completely sure of my answer, cause I only have one try left!

or should I find the magnitude of the gravitational force. And set F(g) + F + F(n) = 0?

ok so since the sum of all the forces is zero, could it be -628.67?

would it just be 0? F=M*A...A=0, so F is equal to zero?

ok, the force vector is F= 1.62i + 1.75j And the angle is 47.21 degrees? 47.21 is wrong though, i tried it.

Homework Statement In the figure, a crate of mass m = 111 kg is pushed at a constant speed up a frictionless ramp (θ = 30°) by a horizontal force F . The positive direction of an x-axis is up the ramp, and the positive direction of a y-axis is perpendicular to the ramp. (a) What is the...

ok, so T = .54 seconds. what should I do next?

how did you get 48t??

Hmm, we have not gone over kinetic energy in class yet. I'll read up on it, and post an approach and see if it's right.

so would that vector be (12(i) + 12t(j))? And I would set that equal to 38?

Homework Statement In the figure, a crate of mass m = 111 kg is pushed at a constant speed up a frictionless ramp (θ = 30°) by a horizontal force F . The positive direction of an x-axis is up the ramp, and the positive direction of a y-axis is perpendicular to the ramp. (a) What is the...

Homework Statement A car traveling at 48 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 53 cm (with respect to the road) while being brought to rest by an inflated air bag. What magnitude of force (assumed constant) acts on the passenger's upper torso, which...