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coefficient of friction
The ________: Number that tells how sticky two surfaces are.
Kinetic friction
________ must always act in the opposite direction of motion.
Normal force
________- perpendicular to incline.
Normal force
________: the force of a surface on an object that acts perpendicular to the surface.
Force of friction
the force of a surface on an object
Kinetic friction
friction force when something is moving along the surface and acts opposite the direction of motion
Static friction
friction force between two surfaces that arent moving relative to one another
Newtons third law
The force of Object A on Object B is equal in amount and opposite in direction to the force of Object B on Object A
Newtons second law
an objects acceleration is the net force it experiences divided by its mass, and is in the direction of the net force
A 2-kg block and a 5-kg block are connected as shown above. The coefficient of friction between the 5-kg block and the flat surface is μ = 0.2.
(a) Calculate the magnitude of the acceleration of the 5-kg block. (b) Calculate the tension in the rope connecting the two blocks.
(a)acceleration is 1.4 m/s2
(b) tension is 17 N
A 2.0-kg cart is given a shove up a long, smooth 30° incline. If the cart is traveling 8.0 m/s after the shove, how much time elapses until the cart returns to its initial position?
(A) 1.6 s
(B) 3.2 s
(C) 4.0 s
(D) 6.0 s
(E) 8.0 s
B
Note 
Flashcard (24)