An object is seen to fall from aeroplane and observed to take 15 seconds to reach the ground. Assuming that air resistance is negligible. Calculate
(1) The height of the plane from the ground
(2) The velocity with which the object strikes the ground.

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

A26 cm object is 18 cm in front of a plane mirror. a ray of light strikes the object and is reflected off the mirror at a 42-degree angle. what is the angle of reflection? degrees what type of image is formed? what is the size of the image? cm