Recent content by Zynoakib

thanks. I have got the answer!

Homework Statement A particle of mass 4.00 kg is attached to a spring with a force constant of 100 N/m. It is oscillating on a frictionless, horizontal surface with an amplitude of 2.00 m. A 6.00-kg object is dropped vertically on top of the 4.00-kg object as it passes through its equilibrium...

Why do I need to include PE change? Shouldn't all the PE energy be converted to KE right before it crashes? So the PE change will be included into KE.

Thanks guys, now I understand

Homework Statement A 500-kg satellite is in a circular orbit at an altitude of 500 km above the Earth’s surface. Because of air friction, the satellite eventually falls to the Earth’s surface, where it hits the ground with a speed of 2.00 km/s. How much energy was transformed into internal...

Just want to explain it in my own wording Although the Earth's gravity can still attract the object to slow it down no matter how far it goes, it will take forever for the object to be slowed down just by a slight degree.

orbital speed of each star = 220 km/s orbital period of each = 14.4 days. Distance Traveled in one period = (220000)(14.4 x 24 x 60 x 60)m. Then, you can get the radius from 2(pi)r I have solved the problem by using centripetal force= gravitational pull. So probably using Kepler's third law is...

Homework Statement Plaskett’s binary system consists of two stars that revolve in a circular orbit about a center of mass midway between them. This statement implies that the masses of the two stars are equal. Assume the orbital speed of each star is 220 km/s and the orbital period of each is...

I know once the escape velocity is reached, the object will continuous to move away from the Earth. But the Earth's gravity can still act on the object no matter how far it goes, so what keeps the object from stopping or even returning back to Earth? Thanks in advance!

Just Fx = 80 from the nail? I don't think there is a horizontal force.

That's what I can think of. (80N)(0.05m) = (n)(0.03m) n = 133N but this is incorrect and I don't know why

I don't think so. What does it mean?

Homework Statement A 10 000-N shark is supported by a rope attached to a 4.00-m rod that can pivot at the base. Calculate the tension in the cable between the rod and the wall, assuming the cable is holding the system in the position shown in Figure P12.49. Homework EquationsThe Attempt at...

Homework Statement One side of a plant shelf is supported by a bracket mounted on a vertical wall by a single screw. Ignore the weight of the bracket. Find the horizontal component of the force that the screw exerts on the bracket when an 80.0 N vertical force is applied as shown Homework...

ok I have finally get it. Thanks!