If the position versus time graph of an object is a horizontal line, the object is A. moving with constant non-zero speed.
B. at rest.
C. moving with constant non-zero acceleration,
D. moving with infinite speed.

What is the coefficient of kinetic friction μk between the block and the tabletop?

If anyone who can me with this hw? i would really appreciate it

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward