Answer:
A)
Explanation:
If both boxes are at rest, this means that the friction force must be equal to the component of the gravity force, trying to accelerate the box down the incline.
If the angle that the incline forms with the horizontal is θ, the component of the weight along the incline is as follows:
Fgp = m*g*sinθ
As sin θ is different for the 30-degree incline than for the 45-degree one, the components of the weight along the incline, that must be equal to the friction forces (due to the boxes are at rest), can't be equal each other, as masses are the same.
So, the frictional forces acting on the two boxes have NOT the same magnitude, so A) is FALSE.
All the other choices are true.
Given,
The mass of the sled and the person, m=62.5 kg
The coefficient of the kinetic friction, μ=0.190
The harness tension, T=180.o N
From Newton's second law, the net force on the sled is given by,
the net force is also given by the sum of all the forces acting on it.
Thus,
Where f is the frictional force and g is the acceleration due to gravity.
On substituting the known values,
Thus the acceleration of the sled is 1.018 m/s²
Well water or any liquid actually takes the form of the cup of bowl or whatever you put the liquid in
REMEMBER- Liquid has no shape.
hope this helps!!!!!!!!
OH YEAH DO YOU SEE THIS DO YOU SEE THIS OPEN YOUR EYES SHIKAMARU ITS A **REGULATION HEADBAND
In a series circuit, the CURRENT must be the same at every point.