Mechanics | Relativity Answers

a satellite of mass 200kg is displaced by a distance of 2re from a point on the earths surface,whwre re is the radius of the earth. calculate the work done on the satellite by the force of gravitation. take the valus of the constants in your calculation from the astrophysical data given in the course

A car of 700 kg moving with a velocity of 10 m/s. A motor bike of 120 kg also moving with same speed in the same direction lying behind 10 meter from the car. What is there collision velocity?

A 3000 kg elevator rises from rest in the basement to the floor. A distance of 25m . As it passes the fourth floor it's speed is 3 m/s . There's a constant frictional force of 500N. Calculate the work by the lifting mechanism?

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.59 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

How fast are the balloons traveling when they pass Roger's window?

Assuming the balloons are being released from rest, from what floor are they being released? Each floor of the dorm is 5.0 m high.

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.59 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

How fast are the balloons traveling when they pass Roger's window?

Assuming the balloons are being released from rest, from what floor are they being released? Each floor of the dorm is 5.0 m high.

Suppose you adjust your garden hose nozzle for a fast stream of water. You point the nozzle vertically upward at a height of 1.8 m above the ground (. When you quickly turn off the nozzle, you hear the water striking the ground next to you for another 2.6 s .

What is the water speed as it leaves the nozzle?

A railway truck of 100kg mass traveling with a velocity of 7ms^-1collides with a second truck of 200kg mass and the two couple automatically and move off together. Calculate the velocity of the coupled trucks and the energy lost to the system; if the second truck has a speed of 5ms^-1(a) in the same direction, (b) in the opposite direction and (c) is initially stationary.

The average angular acceleration of a stone lodged in a rotating car wheel is 100 rads .What will the stone’s final angular speed be after 3.0 s, if it starts

From rest? Also calculate its angular displacement during this time.

A satellite of mass 200 kg is displaced by a distance of

2RE

from a point on the

Earth’s surface, where

RE

is the radius of the Earth. Calculate the work done on

the satellite by the force of gravitation. Take the values of the constants in your

calculation from the astrophysical data given in the course

 Why can’t you establish whether you are running a high temperature by touching your own forehead?