Calculate the force to be applied to raise a 20kg block on an inclined plane with an angle of a 25°, at constant speed, if the coefficient of the kinetic friction is Uk= 0.25.

An object is 10. cm from the mirror, its height is 3.0 cm, and the focal length is 2.0 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1.33 -1.33 +0.75 -0.75

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy. work depends on the square of the change in potential energy. work is equal to the negative of the change in kinetic energy. work is equal to the square of the change in kinetic energy

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?