Is it accurate to describe the physical universe as composed of only matter and energy?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.

If you put a helium-filled balloon in the refrigerator, what will happen?