Forces of 10N and 15N are acting on a body in the same direction and same sense. State the magnitude of the resultant force.

Arope has one end tied to a vertical support. you hold the other end so that the rope is horizontal. if you move the end of the rope back and forth with a frequency of 4 hz, the transverse wave you produce has a wavelength of 0.5 m. what is the speed of the wave in the rope?

When doing scientific research ,the sources used should be ?

An object is kept at 45 m high and how much time will it take to reach the ground