Answer:
Explanation:
A block is moving with constant velocity action the action of 3 N force.
Statement A: False, as the block is moving with constant velocity so net force is zero.
Statement B: False, as the net force is zero.
Statement C: True, the friction force is equal to the applied force.
Statement D: True: The net force is zero so that the block is moving with constant velocity.
Statement E: True, the net force is zero so the acceleration is also zero.
Regions in the milky way where density waves have caused gas clouds to crash into each other are called clumps.Clumps are molecular clouds (interstellar clouds) with higher density,where lots of dust and gs cores resides. These clouds are the beginning of stars.
An atom is the smallest part of an element
Answer:
Newtons second law of motion relates to force, inversely related to its <em><u>mass</u></em><em> </em>and acceleration.
Answer:
Coefficient of dynamic friction= md= 0.09931
Explanation:
To determine the coefficient of dynamic friction we must first match the friction force that is permendicular to the normal force of the block and opposite to the drag force, to the component of the drag force in this same direction. This component on the X axis of the drag force will be:
F= 90N × cos(30°) = 77.9423N
This component on the X axis of the drag force must be equal to the dynamic friction force that is equal to the coefficient of dynamic friction by the normal force of the block weight:
F= md × m × g= 77.9423N
m= mass of the block
md= coefficient of dynamic friction
g= gravity acceleration
F= md × 80kg× 9.81 (m/s²)= 77.9423(kg×m/s²)
md= (77.9423(kg×m/s²) / 784.8 (kg×m/s²)) = 0.09931
