Recent content by karis

Homework Statement A light rigid rod PQ is hinged smoothly to the wall at one end while the other end is connected by an inextensible string to a point R directly above P. A weight W is suspended from a point on the rod. If the rod remains horizontal, which of the following change(s) would...

thz so much, cepheid, i got Part B now, as for part A the equation is Gm/r, and what should i do with the m? i rly don't know wt to do next :( :(:(

7.9 is the speed of satellite near Earth's surface, and 20 is the ratio of the mass and radius combining, (1/80)*4

Homework Statement A. The mass ratio of the Earth and the moon is 81:1 and the earth-moon separation is 3.8x108m. At which position between the Earth and the moon is the gravitational potential at a maximum? B. Which of the following statement about a communication satellite in parking...

Homework Statement A low-altitude satellite near the Earth's surface has a speed of 7.90 km s-1. The radius of the Earth is about 4 times that of the moon and the ratio of the average density of the Earth to that of the moon is about 5:4. The speed of a low-altitde satellite near the moon's...

thanks so much!=] i keep on calculating their velocities coz i thought they're different but i got it now! btw, the correct answer is 0.15J

Homework Statement The figure shows a 2kg block moving at a speed of 0.5ms-1 on a smooth horizontal surface. It collides head-on elastically with an initially stationary block of mass 3kg which is fitted with a light spring. What is the maximum elastic potential energy stored in the spring...

Thank you very much:)

Homework Statement A nucleus originally at rest splits into two fragments of unequal mass. The fragment with smaller mass has a larger 1.momentum 2.speed 3.Kinetic energy A. 1only B. 3only C. 1&2 only D. 2&3 only E. 1,2 &3 The Attempt at a Solution well, i can figure out the...