A billboard, mass 15 kg, is suspended from a roof by means of a light inextensible string. Force F pulls the billboard sideways, as shown in the diagram below.
40°
string
F
15 kg
When the angle between the roof and the string is 40°, a closed vector diagram is
obtained for all the forces acting on the billboard.
2.1
What deduction can be made when the forces acting on an object forms a
closed vector diagram?​

An artificial satellite circles the earth in a circular orbit at a location where the acceleration due to gravity is 6.03 m/s^2. determine the orbital period of the satellite.

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.

Why don't you see your reflection in water with waves or repples