A uniform ladder of mass 17 kg and length 6 m leans against a smooth wall at an angle
67° with respect to the ground. A person of
mass 58 kg climbs up the ladder to a point
two-thirds of the way to the top. Assume
that there is no friction between the top of
the ladder and the wall.
Compute the minimum coefficient of static
friction between the ladder and the ground
that would prevent the ladder from slipping.
The acceleration of gravity is 9.8 m/s?.

We all use gps today, even if we don't drive yet. i bet you have been in the car with a parent and they have asked you to get out your phone to find a specific location. in your car, on the phone, you are using a very sophisticated technology. gps satellites circle the earth twice a day in a very precise orbit and transmit signal information to earth. gps receivers take this information and use trilateration to calculate the user's exact location. essentially, the gps receiver compares the time a signal was transmitted by a satellite with the time it was received. the time difference tells the gps receiver how far away the satellite is. now, with distance measurements from a few more satellites, the receiver can determine the user's position and display it on the unit's electronic map. what type of signal is utilized by the gps satellite?

What will a positive and a negative charge do if they are separated from each other?

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.